n-reg or not
the other aspect is risk of being forced to re-register with the costs mentioned above.
The DfT held their consultation last year which was a pointless exercise and poorly disguised attempt at removing UK based N-reg aircraft from UK airspace.
It simply highlighted their inability to prove any significant benefit and the numerous objections pointing out the considerable disadvantages as well as being unable to segregate N-reg aircraft from other states including other EU countries.
EASA may decide to have a go at the same subject and if they do it will no doubt be more effectively targetted at non EU aircraft and cover EU land as a whole giving little option to do anything else but comply or leave I suppose.