And on top of all this, it's an ace area anyway!

Crofton Park is an option, depending on where you are in HOP and so how close you are to CP.

Similar way of doing the same thing is to ride the Overg on to Whitechapel and change for Baker St there. The snag is that the H and City line frequency is actually much worse than the Overg's! Handy feature is ability to carry a bike back home though, which I've done often if I've been out and about near the office (Gt Portland St).