One interesting fact: even though they are explicitly looking for Python devs, no actual Python experience is required. This is the second instance I see of something like this in London (the first being the company I work for, http://new-bamboo.co.uk).
It looks like there's a lack of experienced developers in London, or at least in some technologies. Therefore companies needs must resort to finding "generic" good programmers who can be trained.
Of course I don't have any statistically significant data, only anecdotal experience. However it does resonate with the difficulty that we have had finding Ruby devs at New Bamboo in the last few months.
Does this sound familiar to anyone? I wonder if there's the same lack of supply of PHP devs.