Winds reducing to 5kts variable in the morning. Tempo of rain in the afternoon with 8000m viz and cloud broken at 1200'
The synoptic shows a warm front pushing up from the south - around N Wales at 1200. I'd keep an open mind and see how what how the forecasts look in the morning - more often than not I find them to be overly persimistic these days.
Also given its a dual xc you will have your instructor with you so he/she can keep you right.
Good luck !