GM Polystyrene was formerly known as South Wales Polystyrene (SWP). SWP was formed in 1989 and, for 18 years, was one of the leading providers of expanded polystyrene products across the UK.
Initially located in South Wales, the acquisition of Devon-based Westward Polystyrene in 1998 further consolidated the company’s position as a market leader with nationwide coverage.
In 2007, a management buy out saw one of the two directors of SWP leaving to pursue other interests. The remaining director, Graham Middleton, decided that, with his vision for the future of the company, the time was right for a complete overhaul of the company’s brand and identity, hence the birth of GM Polystyrene.