A unilateral variation to the contract could give raise to a claim for breach of contract
If you are lawfully hired, you are entitled to at least the NMW
Updated 27 September 2011.
Read this Guide in Polish: Krajowa płaca minimalna - twoje prawa w UK
WHAT IS NATIONAL MINIMUM WAGE?
The national minimum wage (NMW) is a legal right to a minimum hourly rate of pay covering almost all workers in the UK above the school leaving age. It is divided into rates that apply to workers of different ages.
The statutory right and its extensions: the definitive guide.