Sent to the TFL contact page :
I really like what you are doing with the Transport For London website. Being a Londoner I personally find it very useful.
To make planning public transport use in London even more easy, I implore you to consider supplying the necessary data feeds to enable Google Transit to work in London.
Please see the specification here.
As you can see, a growing number of cities are doing this.
Many thanks for your consideration.
I should have done this ages ago