The GMB trade union say that their demands are not just about pay, but also a significant change to the terms and conditions. "That's not even what the focus is on," says service and repair engineer Toby Golden, "the changes will impact my life on a daily basis hugely. When the new contracts are introduced in March, British Gas workers' core hours will be extended, losing 27 days off per year, introducing a six week roster with little flexibility and notice, as well as losing their London living allowance.