When it comes to feel-good fashion, nothing seems to compete with jolly rainbow stripes. This winter, cheery multicoloured knits acted like a shot of espresso for our wardrobes. Seeing how quickly these colourful jumpers sold out, it's no surprise that this trend is moving into our summer wardrobes. So what's going to take over after rainbow jumpers? Will it be swimsuits? Espadrilles? Sundresses? Judging by Instagram this week, the front-runner so far to take the gold medal is rainbow-striped trousers, as the likes of Lucy Williams and Maria Bernad have been wearing breezy flares as a jazzy alternative to a sarong or kaftan.