Judging by the airline and the origin of the flight it is probably a very boozed up passenger causing a lot of disruption.
All counter terror intercepts go to Stansted as there is plenty of space in case something goes boom!
Was flying a med crew on a fixed wing air ambulance one day approaching the french coast from the south when the pilot called me forward. Knowing I was interested in aviation, told me two QRA Typhoons had just intercepted a certain airline’s aircraft when contact was lost. His comment was ‘that is going to cost them an awful lot of money’ as he suspected they hadn’t changed frequencies.
Saw the NOTAM for the Olympics in 2012, the penalties were dire for anybody busting the London no fly zone and Northolt was closed to us for the duration.
About 4 or 5 years ago a helicopter out of IIRC Oxford airport hadn’t filed a proper flight plan, air defence controllers got very worried and scrambled two Typhoons from Coningsby and cleared them supersonic overland to intercept, now that made the press when they dragged the boom across Southern England.
Tartan 31 is still off the east coast race tracking. Another Voyager coming off station after flying an Op Shader mission into Akrotiri.
There were press photos of Pumas from Benson with GPMG and a matrix board so they could intercept light aircraft and pass them very clear messages to comply.