So reading between the lines, it’s anyone’s guess and no one really knows when external recruitment will open up, with the proviso that those in any kind of pool will get a crack at any openings first, followed (maybe) by anyone that was caught up in the assessment process when it all came to a stop.
As an interested observer, my guess is not before the winter schedule and most probably not before the new year; and that’s before making any allowances for the effects of new COVID variants and related restrictions coming back into play, and the state of the U.K. economy and more broadly the general economic situation globally
Very difficult to predict. Best places to bide one’s time are probably Ryanair or cargo.