The legal mechanisms in place don't appear to be adequate as when that number of activists are ignored. Certainly in parallel with the online regulation, the legal right to protest has been restricted by the previous Tory government, and this current one.
What's also concerning is the lack of oversight with MPs, they follow guidelines, which seem to let them off from regular laws (https://www.bbc.co.uk/news/uk-politics-68503255 using taxpayers money in a private dispute- fraud) (https://www.bbc.co.uk/news/uk-politics-68841840 reads like fiction).
Why MPs are not FCA regulated is beyond me, corruption should be stamped out.