Went to vote early. Cast a write-in vote for "WORLD SOCIALISM" for the Mayor and one for "SOCIALISM -- SPGB" for the constituency (no Socialist standing in mine, only the 5 usual suspects). I kept the London-wide one (it was supposed to be orange, but it's definitely pink) for our records, as it's set out much more clearly than the ballot paper for the European Parliament we contested as a list. It only contains the names and emblems of the parties contesting whereas the one for the EP had the registered name, the description, the emblem and the names of all the candidates. This is way we want go as, for us, it's "the case not the face" that counts.
The reason they have done this is that the votes will be counted electronically. This means that each ballot paper is shown on screens which can be seen by all of the few hundred people (the counting agents of the parties) who will be at the count. This includes write-in votes which will be seen by more than, as with hand counting, just the particular counter who counts them and the election agents of the candidates. That's why it's worthwhile going and casting a write-in vote (rather than just abstain). In fact, as I'll be at the count in Earls Court, where the votes of Merton & Wandsworth and other constituencies in South West and West London will be counted, I'll be able to see my vote as well as those of the dozen or so other comrades in these constituencies. But if you live in Lambeth, Merton, Southwark or Wandsworth don't forget to turn auto-pilot off so as not to cast a write-in vote. There are Socialist candidates there on the yellow ballot paper. You can vote for socialism directly by voting for them.