The best wet weather tyres designed for the UK climate contain expertly designed technologies built into the tyre tread to efficiently evacuate surface water and overall tyre compound to prevent aquaplaning and maintain grip on the road surface. The UK tends to see intervals of heavy rain all year round, regardless of the season, however depending on the temperature it may be worth switching to an all season or winter tyre in conditions below around 7°c in colder or rural parts of the country.
Regardless of seasonal tyres, the ideal wet weather tyre features technologies designed to cope with rain, wet conditions, aquaplaning resistance, etc. For example, the Goodyear Vector 4Seasons features Aqua Control Technology, EfficientGrip Performance 2 features Wet Braking Technology both of which help to influence handling and performance on wet road surfaces. You can also review wet grip rating on the EU Tyre Label.