Nail Warehouse sale...
3 for 2 during May and June
I have 4 of their polishes. I had better blog about them. With the offer it works out at £1.43 w/out VAT. They do sell on a retail basis. That's how I got mine. You don't have to be trade.
Clouded Slate and Asteroid are great. I haven't tried the others.
And don't forget your copy of InStyle magazine!