How many days do you actually need? What should you budget? And what is the fastest way in from Heathrow? Tracy and Doug answer the 10 questions listeners ask most about visiting London, with the numbers and the reasoning behind each one. - How many days: why 4 to 5 is the first-timer sweet spot - When to go: the months we avoid, and why April catches people out - Getting around: zones, the £8.90 daily cap, Oyster versus contactless - Heathrow into London: Elizabeth line, Piccadilly line or ...