I think it's safe to say that we have touched a nerve:
You can read the whole shebang over at Dave's but I was particularly struck by this section:
So is Boris really suggesting that no public transport could be found at that time of night? Was there a little snow on the roads perhaps?
Or is it simply the case that the London transport network is now too dangerous for a few Mayoral advisors to use after 8.30 at night?
If so, there's a certain Kebab-eating home secretary that they should have some words with.