I see no reason whatsoever why the UK tax payer should pick up the bill for a new fleet of gliders when it has a fleet of gliders that can do the task.
The problem is that the MoD took their eye of the ball and let a company fail to maintain the fleet and keep records to show the compliance of their maintenance and repair.
The result is that some how compliance with proper maintenance practices has to be demonstrated before these gliders can take to the air, some of this can be done by inspection but some repairs will have to be re-repaired if they don't come up to standard.
The assumption that at one moment these aircraft were servicable and as soon as the MAA stepped is they instantly became unserviceable is a distortion of the facts, I have no doubt that most of the gliders were not unsafe to fly in the short term however their was no way that the maintenance oversight was up to the standard required by the RAF to fly air cadets. This fact left the MAA with no alternative but to stop the fleet from flying.
There is little doubt that the RAF have been slow to get on top of this problem ( air cadet gliding being not the top priority in the nations defense ) but now they have a team in place who are dedicated to this task, for most of them it is their first experience of aircraft of this sort of construction and so they are on a cautious learning curve and wisely not rushing into things and making ill considered decisions.
It is easy to be critical of the speed of progress of the re- activation team but the real criticism should be directed to those who's maintenance practice fell well short of that required and precipitated this situation in the first place.