It seems pretty odd to the layman that the two polls should differ so significantly on the two groups you highlight-particularly since you say there is no obvious reason for it.

My guess is that, given the pathetic state of UK local government, few EU voters would bother to register for provincial lcoal elections. However, the London mayoral election has an altogether higher profile.

From a psephological point of view, we need to take the differing registers into account if any predictions are to be made from Westminster lection results to London ones, or vice versa.

Good to see you maintaining an objective non-partisan approach! Jack’s point above has got it right on this one…personality rather than party label and I suspect this will result in roller-coaster polls.