I use a Decathlon lightweight MH500 jacket for daily use about town and for days out on the hills, costs £79.99. https://www.decathlon.co.uk/p/men-s-hiking-lightweight-waterproof-jacket-mh500/_/R-p-301681?mc=8502097&c=BLUE
Great for wind and rain. Doesn’t have much insulation, so you’ll need a jumper on when it gets chilly