Before you learn to fly in Winter in the UK, you will learn PATIENCE.
Your flying lesson depends on a free lesson slot, availability of aircraft, instructor and suitable weather.
During Winter, maybe you will achieve half your intended lessons.
If you live fairly local to the airfield, I would recommend turning up, even if the weather is initially unsuitable for your lesson. Conditions may improve for a while later in the day, and slots will have been cancelled due to Wx.
Mid-morning slot and after lunch slot should be fine, if achievable. Depending on local arrangements, first and last slot of the day may be complicated by hangar logistics.
Taking advice from your instructor is a good idea. Do not pay in advance.
Good luck, safe flying.