Doesn't really matter - I don't believe that this has been sorted out yet
https://www.balpa.org/Media-Centre/Press-Releases/Pilots-repeat-EU-flights-concern
There are a plethora of similar arrangements that might be easy in principle but actually need doing and agreeing by both parties if utter chaos isn't to happen.
And Her Majesty's Government has been pissing the time up the wall
https://www.balpa.org/Media-Centre/Press-Releases/Pilots-repeat-EU-flights-concern
Pilots repeat concerns following European Commission announcement that EU flights could cease to operate from UK
Release date: 12/12/2017
The statement from the EU commission on the ability for UK flights to operate in Europe should no deal be reached is cause for great concern, says the UK pilots’ association.
The British Airline Pilots’ Association (BALPA) has repeatedly called for clarity on how flights will operate post-Brexit and says that a no deal is “not an option”.
This notice from the EU Commission’s Directorate-General for Mobility and Transport states: Air carriers of the United Kingdom will no longer enjoy traffic rights under any air transport agreement to which the Union is a party, be it to or from the territory of the United Kingdom, be it to or from the territory of any of the EU Member States.
BALPA general secretary, Brian Strutton, said:
“Here it is in black and white from the EU Commission – UK flights to the EU will be grounded in March 2019 should no agreement be reached.
“We need the UK Government to sort air traffic rights now. Once again, no deal is not an option."
Notes: Find the full EU statement here
There are a plethora of similar arrangements that might be easy in principle but actually need doing and agreeing by both parties if utter chaos isn't to happen.
And Her Majesty's Government has been pissing the time up the wall