If I were a schoolteacher marking Sir Keir Starmer’s first 100 days, then the report would be covered in red ink. “After a promising start, Keir seems to have got in with a bad crowd and lost his way. He needs to pay less attention to the textbook and be more aware of his environment. I expect to see a big improvement, if not he may not make it to the end of term. Could do better. Five out of ten.” Things started so well. He looked the part and handled the wave of riots with quick and tough action. Making an example of rioters with speedy jail sentences killed off the rebellions within days an…