this is theoretical seating in action as of t-72
over time as the cabin fills up more seats will be released, but not specifically at t-48 or t-24. The seating is now very dynamic.
it does create a problem for people on separate tickets trying to get seats together.
In the current environment I would not expect the block to get released, but once you get on board you will probably have a large number of available seats
this is the main thread on the theoretical seating :
https://www.flyertalk.com/forum/brit...ts-status.html