Originally Posted by
Heathrow Harry
No
At least one will be parked on a "readiness" basis - the last SDSR said "one will be available at all times" IIRC
depending how you understand that, that means both will be running at the same time, with one at R2 or higher.
"Continuous Carrier Strike" calls for QE to be working, whilst PoW is working up/doing maintenance packages etc and vice versa.