flyer55
Not sure what you mean by "BA own those routes" as all 3 are within the EU, so even if the franchise and BA permissions were to end tomorrow, GB could freely continue to operate them in their own right.
"Ownership" of any routes within the EU is irrelevant, unless of course there are slots involved if the slots themselves were to belong to BA.....but GB hold all their own slots at LGW (putting aside a few they've swapped with BA as described above) so there's no problem.
In trim.