Some key trends in women's tops for the current season in the UK include lightweight and breezy summer tops featuring floral prints or pastel hues, cozy and layer-friendly winter tops like chunky knit sweaters or turtlenecks for added warmth, and blouses with puff sleeves adding a touch of femininity and drama to outfits. These trends offer stylish options for women seeking on-trend tops for different seasons in the UK.