It's impossible to plan, things change so much and the pubic are also getting more and more restless.

Again tourism restrictions depend on how much of a country's GDP is tourism based, Greece would have much more interest in opening borders than let's say Austria or Germany.

For upcoming flights in May and June, are BA basing reservations on blocked middle seats on current flights?

Because O'Leary apparently just said " either the government pays for the empty middle seat they force us or we won't fly if we have to block out the middle seat"