well judging by all the poles, romanians and slovaks in my neighbourhood, London seems to be a good place for work all year round! rent is a bit steep tho!
but seriously, i dunno... the hills are quite low out east and thus the season can be proper short. however, big development suggests money and money suggests snowmaking facilities and so if you are interested to learn of the biggest (most lucrative) place, i would aim for Bansko in Bulgaria.
Bansko ski resort in Bulgaria