4.4.3 started for One M8 in Europe

So far I’ve seen it confirmed on Nordic phones (HTC__Y13) and some other.

So, when will I get it?
As a “rule”, general European rollout (UK etc) tends to be around 7-10 days after the Nordics got it. Give or take a bit. Could be faster or slower. You simply get it when you get it.

Will of course post more when I know more.