My thoughts too. If you're that close to finishing, maybe two weeks of dedicated effort in the UK are a much better idea.
Talk to your flight school and see if they can arrange for you to fly twice a day for two weeks straight, weather permitting. You've gone solo already so instructor availability will not be a huge issue anymore, although obviously you will at least require some dual time.
Once you get the hang of looking at the weather in great detail, not just the TAFs, METARs and Metforms, but also rainfall radar and such, you'll find that even bad days usually offer some flying opportunity, although you may have to be very flexible with your plans and hang around a lot waiting for a rain shower to pass etc. Obviously for the QXC you're going to need half a day with good forecasts, but if you're just going to do circuits for an hour, all you need is that hour of reasonable circumstances, plus a safety margin.