Jeezus, what are you going on about? You keep making this really obvious point over and over again - that claims of criminal actions not backed up by evidence can be libel - and as far as I'm aware, nobody has argued against this or suggested otherwise. I don't know who you think you're having a debate with.
If there's no evidence, then of course it means Haslam's talking out if his arse - because he's claiming he could ruin Morrissey's career with a few tweets, whilst in fact the opposite would be true: if he doesn't have evidence, Morrissey would sue him for slander and Haslam's career would be over.
You say you're a lawyer? Christ, I'm glad you're not mine!