Notes issued are either backed by Bank of England notes at a rate of one pound to one pound sterling, or can be backed by securities issued by the Government of Gibraltar. Although Gibraltar notes are denominated in ''pounds sterling'', they are not legal tender anywhere in the United Kingdom. Gibraltar's coins are the same weight, size and metal as British coins, although the designs are different, and they are occasionally found in circulation across Britain.

Can we conclude that can gibraltar coins be used in the uk?
no