It's probably a good idea to go to it, if you are a PPL.
I just hope they make an effort to give it a practical slant. It is trivial for a wx forecaster to rant on about Hadley cells and the other theoretical stuff...
I went to a weather course a few years ago (not the UK MO one) and found it sort of OK at a very basic VFR level, but did not manage to take much home from it.
I'm not suggesting that these weather courses in any way replace the need for IMCr or instrument training
The weather courses in those are pretty naff and almost irrelevant to real flying
If you can learn how to build a picture from a variety of
websites, that is the real game nowadays.