Agreed! The UK weather is always like this. My CPL took about 3 weeks back in the summer of '08 as a result of 'unseasonably' warm and calm weather.
A little later in the year and well into Autumn I cancelled 2 IR skills tests because the weather was awful. On both occasions the Examiners heartily agreed!
I finally did the test on a day when it was barely marginal. The Examiner gave me a get out clause but I was impatient and I argued that the wind would be in limits when we were due to take off. It was...then...but it jolly-well wasn't when we came back 2 hours later for the approach to Cranfield!
My purely human piloting skills couldn't cope with the extraordinary conditions and partialled the test on the NDB approach. I then had to fork out a small fortune to do a re-test - £1000 to take off, go outbound, turn base, tootle in on the NDB, and land.
So, the moral of the story: only do the test when the weather isn't going to play a
critical role in whether you pass or fail. It's hard enough being tested in brilliant weather, let alone bouncing along in heavy turbulence dodging hailstorms and the like!
Oh, and Good luck!