I'm flying TLV - LHR on April 15th (7879). Up until yesterday, most of the economy seats were available to reserve both in MMW and also in expert flyer.

But today, when I logged in to check, an entire chunk of economy seats have been blocked (all seats in rows 37, 38 & 39) . They're not reserved, but blocked by BA.

Any reason why? Can they be planning to cancel the flight or change aircraft?

Sorry if it appears I'm nervous - after 2 years of COVID and the craziness of flying during this time, I'm super sensitive to anything out of the ordinary.

Thanks