I'm reliably informed that Mayor Johnson will attend tomorrow's private briefing of MPA members by officers responsible for the policing of the G20 demonstrations. He has previously attended few if any such gatherings on any subject.
This one had originally been scheduled well before the G20 summit took place, and was to have addressed the general theme of "major event policing". It will now start half an hour later than first intended - at 13.00 rather than 12.30 - in order to accommodate the Mayor, and will concentrate entirely on the G20 operation. Now there's a meeting I wouldn't mind bugging.
