The natural habitat of this trend is the queue at passport control in any airport in Ireland during the summer months. Outside, it's raining. Inside, people are dressed as if they are still poolside in Marbs. It's one thing wearing this type of garb when you are getting off the plane, which, technically, is still part of the holiday. But people in high-summer clothes for day-to-day office life? Totally ridiculous.
Offences include: wearing anything in neon yellow; strapless maxi-dresses with those elasticated bust panels that inevitably slide down; off-the-shoulder gypsy tops; playsuits; flip-flops; denim cut-offs, particularly ones with a lot of shredded fabric; shirt dresses that are just that fraction too short; broderie anglaise.
See Daniella Moyles, on how to dress for work in the Irish summer. She's thrown in a Birkenstock, the ultimate summer shoe, but still looks well put-together and work-appropriate.