Ease into London with the British Museum in Bloomsbury, which is one of those places that can happily swallow half a day, but for a first day it’s best to keep it focused. Aim for about 2 hours and head straight for the highlights: the Rosetta Stone, the Parthenon Sculptures, and the Egyptian mummies. Entry is free, but it’s smart to book a timed slot online if you’re visiting on a weekend or during school holidays. The nearest Tube is Tottenham Court Road or Russell Square, and from either it’s an easy 8–10 minute walk; arrive a little before opening if you want a calmer start and shorter bag-check lines.
Walk north-west through Bloomsbury to the Foundling Museum, which is much quieter and gives a lovely, more human-scale contrast after the grand sweep of the British Museum. It takes about 1–1.25 hours to see properly, and the storytelling around the first children’s home in London is genuinely moving. From there, it’s a straightforward Tube or taxi-hop down to Covent Garden for lunch at Dishoom Covent Garden; if you can, book ahead, because it fills up quickly. Expect to spend around £20–£35 per person for a solid lunch — the house black daal, bacon naan roll, and a chai are the safe, excellent choices. If you’re walking between spots, factor in roughly 20–25 minutes, but the quickest option is usually a short ride or a couple of Tube stops.
After lunch, drift through Covent Garden Market rather than trying to “do” it — this is the right place to browse, people-watch, and ease into the city’s rhythm. The covered market, the arcade-style lanes, and the little side streets around Neal’s Yard make this part of the day feel very London without demanding much energy. Then head over to Trafalgar Square for the National Gallery, which is perfect after a busy morning because it’s compact enough to enjoy without museum fatigue. Free entry, usually open until 6 pm, and it’s worth focusing on a handful of masterpieces rather than trying to see everything. From Covent Garden it’s an easy 10–15 minute walk through The Strand.
Finish with a relaxed South Bank walk toward the London Eye area, which is one of the best first-evening introductions to London. Start around golden hour if you can — the river, St Paul’s Cathedral in the distance, and the lit-up skyline make the whole city feel instantly cinematic. This stretch is best done on foot, with time for an optional drink or snack along the way, and you don’t need to rush it; 1–1.5 hours is perfect. If you’re heading back by Tube, Waterloo and Embankment are the most convenient stations, and after a full first day it’s worth leaving the evening loose enough to linger by the river rather than trying to squeeze in one more stop.