Exploration time can vary depending on a few factors: the number of planned activities, whether or not your group has decided to add any optional excursions, and general travel variables like traffic. How you spend your exploration time is entirely up to you. You could sit in a café and people-watch, grab a few friends and discover a new part of the city, or do some souvenir shopping. On busier days, you might just have enough exploration time for a quick lunch.
You will have roughly three half days free. There is so much to see and do in London, so do some research and plan ahead. If you need inspiration, here are some exploration time suggestions:
Visit a free museum like the British Museum, the National Gallery, the Tate Modern, or the Victoria and Albert Museum.
Explore the Borough market.
Grab a sandwich from Marks & Spencer and have a picnic in St. James’ Park.
Traveler tip: London has many distinct neighborhoods to explore. Head to the South Bank for pop-up restaurants, shops, and street performers, Shoreditch for incredible street art, and Notting Hill to visit the famous Portobello Market.