Women should go for fashion accessories that multi-task in order to avoid over-filling their suitcase with unnecessary items when they go on holiday, an expert advises.Lisa Armstrong, fashion editor at the Times and a contributing editor for British Vogue, suggests that big sunglasses are a great item that not only look good but also protect the eyes."I love the huge beach bag. You can wear that on the beach but it's a bag that can be taken onto the plane as well," she says.Ms Armstrong also suggests that a kaftan is an item that will work on the beach, but can also be dressed up with a few fashion accessories in the evening.Hats are also a great way to look elegant while also providing protection from the sun, she says.Recent research by Special K found that British women waste up to £650 million buying summer outfits that do no fit because they are unwilling to admit they have put on weight over the winter.(c) 2008 Adfero Ltd.