And Nigel, in the mangled words of Mandy Rice-Davies, Iains would say that, wouldn't he? Don't be such a naif, Nige!
You mean he would confirm that the word he originally used in a properly constructed sentence: Personally I expect this division, coupled with the invidious advance of momentum, to totally destroy the labour party.

You may wish to consider me na?ve, but I consider that you have never given up the role of bullying schoolteacher.

Pointing out a wrongly used singular in a later sentence does nothing to support your point about the earlier sentence.