Don't cycle to work, its too far. I am due to start a new job in London soon, so I might think about it a bit more seriously, however Mrs thinks I will end up dead squashed by a van.
The runs I have been doing have basically been my morning dog walks too so everyone wins. I do plan to continue the running, its just an annoying setback after only a couple of weeks.
Epsom to London has got to be about 15-16 miles. So although a fair old commute, not a huge one.