Mine's probably 50mins on average.
I could drive it in quarter of an hour (if there were no other cards on the road!) but somehow 5 whole tube stops and travel to/from tube contrives to make it the best part of an hour. Twice a fcuking day.
Used to be a time when such travel never bothered me but I now wish I had that free time spare. Must be an age thang.
Anyone else?