Getting from the Airport
The Heathrow Express reaches Paddington in 15 minutes (£25). The Piccadilly Line is cheaper (£5.50) but takes 50-60 minutes. From Gatwick, the Gatwick Express to Victoria takes 30 minutes. Stansted and Luton have coach and train connections to central London.
Oyster Card or Contactless
You do not need to buy an Oyster card. Any contactless bank card works on the Tube, buses, and DLR at the same capped prices. Daily and weekly fare caps ensure you never overpay, no matter how many journeys you make.
Best Area to Stay
South Kensington, Westminster, and Southwark put you within walking distance of major attractions. For a first visit, being central is worth the extra cost. Avoid staying near airports unless you have an early flight.
Weather and Packing
London weather is unpredictable. Bring layers and a waterproof jacket regardless of the season. Comfortable walking shoes are essential. You will walk more than you expect, typically 15,000-20,000 steps on an active sightseeing day.