I thought you could take a bike on some underground lines? Is this not correct then?
https://www.tfl.gov.uk/modes/cycling/cycling-in-london/bikes-on-public-transport
https://www.tfl.gov.uk/cdn/static/cms/documents/bicycle-tube-map.pdf
I've got my own dilemma. I can either go to London Bridge or Victoria. From Victoria I could get the District line and change or ride from London Bridge. The later probably being the less preferred as I would have no idea where I'm going and I don't fancy riding for the first time in London the day before 100 miles.
All I know for sure at the moment is I'm going to the expo on Friday, traveling to London with my bike on Saturday, watching at least one race in the afternoon before getting up early on a Sunday wondering what the hell I'm doing