If I do read Iains correctly as implying 'revoke' as his second choice like Nigel, that is quite a revelation to me and, I suspect, to cabinet. I am sure their strategy is that because Cherry's amendment did so badly, and because of shouts of "denying democracy", the cabinet assumed revoke would end up in last place in the first round and was only put in as a sop. Since they are the larger party, May's deal is likely to win out over a Labour proposal. So I think they are fairly confident May's deal would win in an Alternative Vote play-off. But if Nigel and Iains are typical, revoke could give a much stronger showing than that if it survived the first round.