Sat it just before xmas and found it pretty tough. However there were plenty of free marks if you just memories thing like you pressure levels (ie 300hp is 30,000ft) and can work out altimeter, interpret at TAF/METAR. Those sort of things you can do from memory and don't require understanding.
I found the atplonline question bank the most useful. It's linked with Bristol GS but I believe anyone can sign up.
As you probably gather Met wasn't a strong suit of mine, give me flight planning any day
All the best
