Gilly Hicks is the sister brand of Abercrombie and Hollister. This is of the same quality. They had stores in the uk however the brand never took off so basically the stuff is all being sold off until it completely fold as a brand.
There is a $10 flat rate shipping fee and there is a chance you may be liable for customs. With this said its still a bargain.
A pair of leggings in A & F selling for £58 and a pair of Gilly Hicks at $8 this is about £4.70 on a basis of a $1.7 exchange rate.