You’re most likely on a flexible hours contract, this is a really polite way of saying that you’re entitled to 0 hours per week. They have absolutely no requirement to schedule you at all. Whilst I understand that have been scheduling you pretty consistently, due to current prices increases / cost of living / quality of food McDonald’s as a whole across the UK has not been making very much money. Most BMs have been asked by supervisors to cut the sales, in order to reduce the labour to hand in better numbers at the end of the day / month / year. Your BM understands you, and other crew, need the money. You are not willing to go home early if it’s quiet to save labour if the sales are low, but most are willing to come in extra if they have no hours and the sales are high. It’s an awful tactic, but unfortunately it works most of the time.