It is not usually a good idea to try to explain humour, but I thought it was obvious to all and sundry that my writing "I am" rather than "Am I" was an error. If you are concerned enough, it arose because I was originally written as a sentence and part of the way through I changed, but because I am not writing for a textbook or thesis but am making a throw away remark I did not treat it as if it had any great significance so did not eliminate that mistake.

Secondly, by sheer chance the mistake led to a valid English sentence with the same meaning. Conversational English is valid English. Literary English is not the only valid form, though I expect we can find examples of that form in literary works if we cared to look.

Thirdly it must have been obvious, surely, that saying "Nigel will explain it" was a gentle dig at your tendency to argue
about any grammatical faux pas, even if it is of no significance whatever. Actually responding is a touch silly.

So a joke. Maybe not a good one, but a joke nevertheless.

Now do you want to say anything whatsoever relevant to the Brexit deal, the current state of the government, the Sunday Times report on military preparations? Or any aspect of Brexit?

Yours, with tongue in cheek,
DMcG