On June 1 we will be sailing on Sapphire Princess out of Southampton London for a 14 day Baltic Cruise. England has always been on my bucket list so we are flying in a few days prior and planning to do some sightseeing in London before our voyage starts.  We've booked a hotel in Kensington and I was looking for any advice on the best ways to get around without using a taxi service.  I read there's a tube really close to our hotel but I also read about the bus service which is also fairly cheap a