basics: female, Australian - ex-Melbournian - now Londoner. My Kona mountain bike, which was my commuter*, is in a shed as I can't face a daily 26 mile round trip through London traffic**. Train/bike is out as I am on a very busy line, where if there is any problem, then not everyone on the station can even board the train, so bikes are not only banned during peak hours, but would be impossible anyway. I've got about 2.5 km at one end and 5 km*** at the other, so I'd have to buy two beaters to leave at either end.
So the upshot is that I am looking at folding bikes, and the folding bike forum here is one of the best resources I've found. I've been lurking there for a few days.
I'll post more in that forum - but I thought I should do my duty and post an intro here.
*hey - i know it's not a perfect commute vehicle, but I like the ride - so sue me!
**I just suspect my mean-time-between-broken-bones would by tiny.
*** ~= 1 1/2 and 3 miles