Autumn has well and truly arrived in London. Leaves line the city streets, pumpkins decorate the shops and knitted jumpers are out in full force. You may think this season is not the best to take part in a walking tour. But you may be mistaken. Insider London have a number of winter warmer tours. You spend half your time inside and the other half out. Meaning you still get to explore London, whilst keeping warm and dry in this sometimes unforgiving season.