Catch up with what? Stupid rote learning of made up grammar (fronted adverbials?) or dated GCSE curricula (curriculums?) - all of which put many kids off education for life. Perhaps the assessments need modification. Universities have adapted their methods of assessment - not sure why it’s so difficult for govt to see the same would be possible in schools.
Many kids are exhausted as well. Any catch ups should be focussed on play, creativity, time outside. The last thing they need is to be cooped up all summer rote learning.
If they were organising a summer of community activities (as they used to here) I’d be well and truly up for that. The council here used to arrange loads of free sessions anyone could sign up to for free - it might be something like working on a magazine, or surfing or football skills, or some sort of mystery to solve, or IT, or sailing, kayaking, or print making, cycling, cooking etc - all aimed at different ages, and abilities, some disability only activities. One of my kids did some dancing together with a dance group - for people with disabilities, they spent a week making a film, my disabled son went surfing which was filmed then spent a morning making music to accompany the film. Middle son spent a week at the local football club doing football skills. The youngest did some diving & climbing .It was brilliant - there was so much choice and all free. We used to look forward to the annual course catalogue. All went because of austerity. That’s the sort of thing kids need to be doing this summer not cramming in classrooms.