Gosh 'Holographic', Superdrug - This was in massive demand when it came out and I managed to snap one up for myself, I'm not sure if they're still available anymore but I'm sure there's dupes out there! First applied this just looks like a shimmery silver but once it dries it gives the most amazingly shiny, holographic finish. Check out a photo here.
Topshop 'Ice Crush' - Glitter and holographic combined in to one, this makes a gorgeous top coat to add another level of wow to your nails.
Models Own, 'Juicy Jules' Boots - I adore this, it builds up to be the perfect glitter varnish - albeit slightly difficult to remove.
Butter London, 'Diamond Geezer' Debenhams - Amazing quality, classy packaging, pretty pricey but it's one to splurge on if you have the money spare.
Accessorize, 'Ivory Lace' Superdrug - Perfect pale nude, very understated but easily dressed up with the help of a glitter varnish.
Nails Inc, Free with InStyle Magazine - Gorgeous pale, peachy pink - simple but sweet.
Ciate, 'Bon Bon' Free with a Magazine - Although not the most long lasting, this is a very pretty lavender/grey.
Topshop, 'Barefoot' - If you can't get hold of the Ciate polish, this is an almost perfect dupe - perhaps a fraction lighter.
No.17 Lasting Fix, 'Mint Choc Chip' Boots - The perfect pale turquoise blue.
Barry M, 'Raspberry' Superdrug - Favourite winter polish, it's slightly dark and moody but reminds me of Christmas as we always have red tinsel in our house.
Deborah Lippman, 'Razzle Dazzle' GlossyBox - Built up this can be worn alone, or I like to use it over the top of Barry M's 'Raspberry'.
Barry M, Peach Melba, Superdrug - Raved about continuously. Incredibly pretty pale peach, very Summery.
Barry M, 'Flamingo Pink', Superdrug - Classic Barbie Pink, everyone needs one of these in their collection.
Avon, 'Coral Reef' - The perfect combination of pink and coral together, this is a favourite of mine in Summer.
So there's my favourite varnishes! What're yours?
I can't really comment on the longevity as I only wear colours for two days at a time due to my job but I can't be wasting time with streaky, thin varnishes that take ages to dry so I assure you none of the above will cause you problems in that department.