

The Met statement (https://news.met.police.uk/news/update-on-policing-in-london-following-proscription-of-palestine-action-499157) includes a ‘report your neighbour’ statement; "If you see material supporting terrorism online report it – visit www.gov.uk/ACT
You can also report suspicious activity by contacting the police in confidence on 0800 789 321."
Use this information wisely.
https://en.wikipedia.org/wiki/Phantom_vibration_syndrome
One of the names given on Wikipedia is a “fauxcellarm” which I love.
“Researcher Michelle Drouin found that almost 9 out of 10 undergraduates at her college experienced phantom vibrations” so it’s certainly common.