Turns out there is engineering work on the line between Victoria and Streatham which is going to make my journey to Heathrow more complicated and my journey home from Victoria coach station longer and more complicated. They seem to have thrown a ton of engineering work on the railways across the one week of the year I am going on holiday (yes I know it is essential but I can't believe how I managed to pick the worst time to use the railway). Think I'll get a taxi to Heathrow, it is unlikely to take longer than the more than two hours it will take by train and tube.