My journey to work goes like this:
overland train, Forest Hill to London Bridge - about 15 minutes
tube, London Bridge to Old Street - about 6 minutes
except that getting from the train to the tube take about 3-4 minutes walk, plus a wait for the tube - about 2-5 minutes, plus a 5 minute walk to Leonard Street. I’ve never done the whole thing faster than 35 minutes and it’s often much longer as the tube is crap and hot.
So here’s my solution and its much more fun - run from London Bridge to Leonard street, its 1.55 miles and i can do it with a heavy backpack in about 13 minutes (i hope to improve on that - and normally not carry a heavy backpack). My new Nike + Ipod helps me improve - have a look at the images (by the way the Nike + Ipod doesn’t plot a map for you, i did that myself using their Google Maps API on their site).
It did gauge my running distance to within 0.02 miles, which is small enough to be accounted for by inaccuracies in the mapping or just running round junctions, cars etc.
So now my total time is about 30 minutes including waiting about for the Forest Hill train which i didn’t include above, and I save at least £2-3 (offpeak/peak) per day by not buying a travelcard