That's a sad parting, but quite inevitable given the incredibly slow recovery of customer demand from the pandemic. The analysis of long-haul booking trends by IATA this week makes for incredibly depressing reading.
At the perilous risk of levity in a situation where today's jobs and livelihoods are clearly and sadly at stake, BA have clearly chosen to forget about 1970 when the first 747-136s were delivered to BOAC. The aircraft were grounded for nearly a year under a BALPA industrial dispute before they actually entered service in 1971, which is the date "officially" recognised as the start of 747 operations in today's comms. There's nothing quite like a bit of re-telling of history as you wish it to be seen today!
Either which way, a sad day and a real blow to those hoping to fly the 747 for a few years to come though.