I watched the HBO film, Into the Storm, this evening.  A magnificent follow-up to The Gathering Storm about which I have raved on this site before.  Into the Storm is a better tale than Gathering Storm but I believe that Albert Finney played a slightly better Churchill.  You can judge for yourself with two of the more risque scenes.  Finney here and Brendan Gleeson here:



Trailer for Into the Storm here.