Super VC10, it would cause far more trouble than you suggest.
Most obviously, that would wipe Ryanair from the UK map. So that’s Stansted decimated, Prestwick gone altogether for pax and massive holes at various UK airports. On a smaller scale Stobart Air couldn’t operate its Southend routes, which is a decent chunk of the airport’s throughout. That’s a lot of direct jobs, not just the theoretical ones in Ryanair press releases.
Then you have another problem of third parties getting caught up - EI registered aircraft operating elsewhere eg Alitalia. It’s plausible other nations might reciprocate bans.