Decades ago I waited for weather good enough to fly my solo cross country. Each week, I'd ask my instructor if the weather was good enough... He'd hmmm, and say, "I don't think so".
On the day I actually did my solo cross country, he had just said the same thing. Another instructor overheard, and said to me "go check the weather yourself". I did, and is was fine. I went right back to my instructor, and reported this. He said "Oh, Okay, go ahead then". And I did. I'd been lazy. I learned that lesson.
Perhaps at these earlier stages of training, it can be frustrating suffering the variability of the UK weather, because your go/no go decisions are being made for you. There will come a point where you'll have to make them for yourself. This is part of that training.
Understand what about the actual or forecast weather makes it not acceptable for your proposed flight. Some factors of weather will less influence your flight as your skills improve. Others are what they are.
Once, while ferrying a C 150 back through Manitoba, I arrived at my planned fuel stop (few and far between in Manitoba) to find the winds gusting to 45 knots with some crosswind. When I got to the ramp, two planes had just been blown over.
One day, you're going to be up there, thinking "what am I doing here!?". Then you'll think back to this frustration, and it won't seem so bad....