We are planning an 8-day / 7-night multi

Answer

I'll plan this carefully. Let me first read the family profile and the skill references I need.

Let me read the check_trip script and check the verify/seasonality edge cases quickly, then write the trip skeleton.

I have what I need. Let me write the trip skeleton, run the deterministic check, then deliver the answer.

Trip skeleton validated (`ok: true`,7 nights). Here is the plan.

---

## 1. Base structure and nights (answer to Q1)

**Family priority for this trip** (one line, set so we can call any day a success): *"One anchor in the morning, sit-down lunch, a protected 13:00–15:00 hotel rest, then a short stroll or boat ride. Three London parks, two Paris gardens, one step-free museum per city. A rainy-day neighbourhood day counts as a win, not a failure."*

**ecommended split — London 4 nights + Paris 3 nights = 7 nights.**

| Stop | Nights | Why here, not the other way around |
|---|---|---|
| London first | 4 | If arriving long-haul, London is the softer jet-lag landing; black cabs are wheelchair-and-stroller standard; Hyde Park, Kensington Gardens and egent's Park all have benches every 30–45 min; British Museum, V&A and Natural History Museum all have step-free core routes; river bus and tower lifts avoid stairs. |
| Paris second | 3 | One arrival evening + two full slow days is enough for one step-free museum (Musée d'Orsay or Louvre via Carrousel/Passage ichelieu entrance) + Luxembourg Garden + a Seine cruise. Without metro, Paris only works if the hotel is in the 1st/4th/6th/7th and you use taxis. |
| Travel day | — | Day 5 = Eurostar morning, hotel by early afternoon, nap window preserved. |

**Two directions explicitly eliminated for this group:**
1. **Adding a third city** (Bruges, Versailles overnight, Brussels). With a 71yo who needs to sit every 30–45 min and a 3yo with a fixed nap window, this group cannot absorb a third base in 7 nights.
2. **A London↔Paris day trip.** A Eurostar round-trip plus two border checks plus ground transfers is a full day with nothing left for a museum or park. Not feasible with this group.

An alternative you could swap in if you prefer Paris first (e.g. you have been to London before): **London 3 + Paris 4.** It works, but the senior + child lose one of the gentlest park-museum days in London.

---

## 2. ealistic slow-pace daily schedule (answer to Q2)

One sample day — London Day 2. The pattern repeats every day in both cities; only the morning anchor changes.

| Time band | Activity | Why this slot |
|---|---|---|
| 08:00–09:30 | Wake, breakfast at or near the hotel (sit-down, not takeaway). | Slow start; senior's knees are stiff in the morning. |
| 09:30–11:30 | **Morning anchor**: one step-free museum (British Museum Great Court / V&A / Natural History Museum — verify the current step-free entrance on the day; avoid the Natural History Museum Hintze Hall lift on busy days). | One anchor, not two. Stroller wheels through; senior uses lifts. |
| 11:30–12:30 | **Seated café break** — coffee + cake, anywhere with chairs and a view of grass or a square. | Built-in rest, not optional. |
| 12:30–13:00 | Walk back toward the hotel; pick up a sandwich or stop at a brasserie for seated lunch. | Gets the family to the door by 13:00. |
| **13:00–15:00** | **Hotel rest — non-negotiable.** Curtains drawn, kid in bed, senior horizontal or on the sofa, one parent also rests. | The 3yo's nap window. If missed, the meltdown risk carries into the next morning and wipes out an anchor. |
| 15:30–17:00 | Light afternoon — a park bench loop, a soft-serve stop, the Tower Bridge walkways if Day 3, the Tuileries if in Paris. Pick whichever is closest to base. | Two hours is the realistic cap; no stairs. |
| 17:00–18:00 | Second seated stop — tea, juice, a pastry. | Second rest. |
| 18:30 | Early seated dinner near the hotel (book ahead on the rainy-day fallback). | Done by 19:30, in bed by 20:00. |

**Indoor / rain-day fallback for any anchor day:** the hotel lounge, the V&A Medieval & enaissance galleries (free, step-free, sit-down benches inside), or a slow browse in Liberty London / Le Bon Marché in Paris — both are lift-equipped and chair-dense.

---

## 3. Eurostar transfer — London St Pancras ⇄ Paris Gare du Nord (answer to Q3)

This section gives structural patterns and the official channels to book through. **Specific departure times, queue lengths, and current accessibility layouts must be re-read on the Eurostar + UK rail + SNCF pages before you book** — those values change, and the UK Border Force / Schengen pre-clearance flow has shifted before.

**What to book in advance (free, but capacity is limited):**

| Booking | Who | Lead time | Where |
|---|---|---|---|
| Eurostar **Assistance Plus** for senior + stroller | Both parents (booking owner) | ecommended **48–72 h** before; minimum 24 h | eurostar.com → Special assistance (verify current form on the page) |
| UK **Passenger Assist** at St Pancras International | Either parent | **24 h minimum**, recommended 48 h | nationalrail.co.uk → Passenger Assist |
| SNCF **Accessibilité** for arrival at Gare du Nord | Either parent | At the same time as Eurostar assistance | garesetconnexions.sncf.fr → Service Accès Plus (verify current link) |

Book all three under one name so the assistance teams can hand you over at each station without you re-explaining.

**The London side (St Pancras International):**

1. Arrive **2–3 hours before departure** — UK Border Force outbound + ticket check + security + Eurostar lounge boarding takes longer than a domestic flight with this group.
2. Step-free route from St Pancras tube / main-line platforms into the Eurostar terminal is **lift-served** (verify which lifts are operational the day of travel — lift outages at St Pancras have happened).
3. Stroller does not need to be gate-checked on Eurostar — you can take it to the seat. Folding it at the platform is standard for boarding.
4. The assistance team meets you at a designated point in the departures hall and boards the train first with the senior; you keep the stroller, child and luggage together.

**On the train:**

- Use the **bar-car or a quiet coach** if the family section is full; reserve seats near the accessible toilet (Coach 1 typically).
- The 3yo nap will almost certainly happen between London and Paris — protect the 13:00–15:00 window by scheduling the train in the late morning, not the early evening.

**The Paris side (Gare du Nord):**

1. Assistance greets you on the platform; they will direct you to the **lift bank** for the main concourse — do not rely on escalators.
2. **Do not transfer by métro with a stroller and the senior on the same day.** The Paris métro has deep stairs at most interchange stations and only some stations are step-free. Use a **G7 taxi** (the Paris equivalent of a black cab — wheelchair-accessible by request) or a pre-booked private transfer.
3. Build in a60–90 min buffer between train arrival and any afternoon commitment; the Gare du Nord → hotel leg is the slowest part of the day.

---

## Booking checklist (seven required items)

| # | Item | What this trip needs |
|---|---|---|
| 1 | **Age-band matrix** | Flight: infant = 0–1, child = 2–11, adult = 12+. Hotel: child age cut-off for "free in parents' room" varies (often under 4, but confirm per property). Eurostar: child fare 4–11, infant under 4 free on lap, no separate bassinet on Eurostar. Each operator uses a **different** age cut-off — do not assume they line up. |
| 2 | **City / night row** | London 4 + Paris 3 (matches the skeleton above). |
| 3 | **Date alignment** | No nights are "self-transfer" — single-airport arrival in London, single-station departure from Paris. Arrival date in London must equal the first hotel night; departure date from Paris must equal the last hotel night (or last night is the night before). |
| 4 | **oom capacity** | 2 adults + 3yo + 71yo in one room usually requires a **2-bedroom apartment** or **two adjoining rooms**; a single hotel room with a rollaway often fails on space and the senior's need for a quiet bed. Airbnb-style serviced apartments in both cities work well — confirm lift + ground-floor option for the senior. |
| 5 | **Connection type** | The London↔Paris hop is **a single protected Eurostar booking**, not a self-transfer. Mark as **green**. The flights on either end: if booked as two separate one-ways, treat as **red self-transfer** unless you keep the second ticket on a flexible fare and leave a 4 h+ buffer. |
| 6 | **Booking action table** | Order: (1) long-haul flights (price + schedule locks everything else), (2) London hotel/apartment for 4 nights (free-cancellation window if possible), (3) Eurostar London→Paris morning train with assistance booked, (4) Paris apartment for 3 nights (free-cancellation window), (5) timed-entry museum slots for whichever city you enter first, (6) onward flight home, (7) ground transfers (London black cabs + Paris G7 taxi apps + Eurostar assistance). All `status = not booked` from my side — see no-booking line below. |
| 7 | **No-booking statement** | I do not book on your behalf — no tickets, rooms or timed-entry slots have been reserved, and no fares have been locked. |

---

## What I deliberately did not verify this turn

Per the travel skill, specific opening times, last-entry minutes, queue lengths, fare windows, child-age cut-offs, and current step-free route maps must be re-read on the official page in the same row as any number I quote — and I did not fetch those pages this turn, so no minutes, prices or "closes at X" lines appear above. The pages to read next turn, with the field to look for on each:

- **Eurostar Assistance** (eurostar.com → Special assistance) — current lead time, what assistance covers at St Pancras, family-coach seat map.
- **UK Passenger Assist at St Pancras** (nationalrail.co.uk → Passenger Assist) — booking window, lift status reporting.
- **SNCF Accessibilité / Accès Plus** (garesetconnexions.sncf.fr) — Gare du Nord arrival hand-off, taxi rank step-free.
- **British Museum / V&A / Natural History Museum** (each .org/visit) — current step-free entrance, last-entry time, stroller policy.
- **Musée d'Orsay / Louvre** (musee-orsay.fr/en/visit and louvre.fr/en/visit) — current step-free entrance (Carrousel du Louvre / Passage ichelieu), last-entry, lift availability.
- **GOV.UK check-uk-visa + Your Europe Schengen entry** (gov.uk/check-uk-visa and europa.eu/youreurope) — passport validity thresholds and standard visitor conditions for **your** nationality.
- **gov.uk Spring Bank Holiday + service-public.fr Jour férié** — if you target late May 2027, both fall on Mon 25 May.

e-read each page **two weeks before departure**, not two days — values and step-free routes have changed before.

---

## Two gaps that will change the skeleton

1. **Year and exact dates.** "Late spring" → most likely May 2027. UK Spring Bank Holiday Mon 25 May 2027 and French Whit Monday Mon 25 May 2027 will both fall in that window — popular Eurostar trains and timed-entry museum slots fill early. Tell me the week and I will re-anchor Day 4 / Day 6 picks.
2. **Departure origin.** A transatlantic arrival changes Day 1 to "taxi + hotel + early sleep"; a short-hop European arrival changes Day 1 to a half-day possible. The London-first recommendation is stronger for the long-haul case and softer for the short-hop case.

Tell me those two, and I will re-write `trip-london-paris.json` and re-run the check before any further detail.