When Claire, a 41-year-old teacher from Manchester, got her first weight-loss injection prescription in early 2023, she considered herself lucky. She'd spent years trying to shift the weight she'd put on in her late thirties, and the 2.5mg weekly injection felt, almost immediately, like it was working. The problem was the bill.

"At 5mg a week I was paying £199 a month. When my dose went up to 7.5mg, it went up to £249. It just kept climbing." By the time she was at 10mg, which her GP said was the right dose for her, she was paying £279 a month. That's over £3,300 a year. "At that point you start thinking: how long can I realistically keep this up?"