Poll was least skill, not easiest to play.
United Kingdom requires the least skill to play because it is almost impossible for them to loose their capital. Even if the allies loose, odds are the UK capital will still be in play since the axis will most likely just have gotten M84 or the allies have conceeded defeat with the fall of Moscow.
Also, the lack of any real british involvement in the game is not going to be as detrimental as no American involvement or no Russian involvement as Britian can only add 12-18 IPCs a round in most games anyway (assuming Africa has fallen, perhaps India as well.)
This is why I like to put the rookie in the UK seat. S/he ca watch the game, participate to learn, and make all the mistakes s/he wants without overly impacting the game.
Not to say that the British power, in the game, is irrellevant or a non-power, just that given their limitations and their situation, any tactic they choose is almost as good as any other. Perhaps this is why many game masters have multiple British strategies. (IC in India, IC in S. Africa, Wait a turn build a fleet, Build an AC and a Trn immediately, build bombers only, etc.)