A hat is a holiday must-have, for both sun protection and style purposes, these are the hats to be seen in this season, says Katie Wright.New Look Blue Acid Wash Bucket Hat, £7.99 New Look Blue Acid Wash Bucket Hat, £7.99 Next Denim Reversible Bucket Hat, £12 Next Denim Reversible Bucket Hat, £12 Topshop Orange Topstitch Bucket Hat, £14 Topshop Orange Topstitch Bucket Hat, £14 Next Black Raw Edge Floppy Hat, £16 Next Black Raw Edge Floppy Hat, £16 Accessorize Raffia Edge Floppy Hat, £25 Accessorize Raffia Edge Floppy Hat, £25 Bonprix Straw Sun Hat, £16.99 Bonprix Straw Sun Hat, £16.99 Dorothy Perkins White Wide Brim Floppy Hat, £5 (was £10), available from Dorothy Perkins Dorothy Perkins White Wide Brim Floppy Hat, £5 (was £10), available from Dorothy Perkins New Look Black Woven Straw Boater Hat, £12.99, available from New Look New Look Black Woven Straw Boater Hat, £12.99, available from New Look