It would take a book to go through every point. Here is just one example of the bizarre and self-contradictory recommendations being reported.
'Read the great writers to improve your own prose – George Orwell and Evelyn Waugh, Jane Austen and George Eliot, Matthew Parris and Christopher Hitchens.'
The Lord Chancellor has told officials that they must not start a sentence with 'however'.
So, let's take a look...
However, they must obtain food from the outside world somehow. (Orwell, Animal Farm)
However, helped by the smooth words of Squealer, she assumes that she must have been wrong... (Orwell, Animal Farm)
It is her nature to give people the benefit of the doubt. However, Mr. Wickham's account seems to leave no doubt that Mr. Darcy is intentionally unkind. (Austen, Pride and Prejudice)
Mrs. Elton is disappointed. However, she decides not to put off her plans. (Austen, Emma)
Celia, now, plays very prettily, and is always ready to play. However, since Casaubon does not like it, you are all right. (Eliot, Middlemarch)
When I was a girl, I was more admired than if I had been so very pretty. However, she's reason to be grateful... (Eliot, Adam Bede)
Laugh? I should have bust my pants. However, they've fixed things up without that. (Waugh, Scoop)
However, it was cheaper than the Crillon, costing in fact only 17 francs a night. (Waugh, Decline and Fall)
However, a problem presented itself at once. (Hitchens, The Trial of Henry Kissinger) However, let us not repine. (Hitchens, Letters to a Young Contrarian)
I'll leave you to find examples in Matthew Parris - or, of course, in any modern writer.
Oh, and we mustn''t forget this one - one of several tracked down by the Independent journalist:
However, I was nudged out of my reverie by the reminder that it was indeed possible to send something through the post on Tuesday and be sure it arrived on Wednesday. (Gove, 2008)
It's linguistic hypocrisy. Do as I say, not as I do. It's usually not difficult to show how pedants use the very constructions they condemn, and normally one can quickly see through the hypocrisy and disregard them with impunity. But it's difficult when you're being paid by a pedant with political power. I pity the poor civil servants who have to waste their time (and taxpayers' money) trying to implement such unreal and eccentric prescriptions.