Marks & Spencer

GSA is proud to be the longest serving supplier of cleaning services to M&S.  For over two decades, we have worked alongside the M&S team; committed to providing a responsive, innovative and professional service that supports the business objectives of M&S.


GSA provides a range of cleaning solutions to Matalan across its estate of 230 retail stores throughout the UK.


Dixons Carphone

Following a highly successful initial 2-year contract, the Dixons Carphone awarded GSA a national contract, increasing our portfolio to 420 Currys and PC World stores across England, Northern Ireland, Scotland and Wales.