I haven't heard anything to confirm that it was torso shots (rather than head shots) that killed this chap. Witness reports on News 24 indicate that officers piled on top on him and then shot him. In ordinary circumstances, to kill someone under restraint is clearly disprortionate. But if they could feel him struggling to get a hand free, then given his unseasonable big coat, I don't see their response as disproportionate at all.
MP5s? Yes, but some SO19 officers engaged in non-uniformed duty carry more concealable weapons. The guys who were fast up to keep up with this guy were reportedly not in uniform.
adr