Jenny was 28 years old the first time she had Botox. She lay, head back, in an unfamiliar room while the botulinum toxin was injected between the tiny lines that ran like train tracks between her eyebrows. She wasn’t sure she looked younger exactly, but it left her with a brow as smooth as gossamer and inspired a clutch of compliments from friends and colleagues.

When other little rivulets started to make their way across the landscape of her face, she reclined in her doctor’s chair and submitted the signs of age to the needle prick of Botox once more. And so it went on… again and again and again. ‘By the time I was 38, I was having Botox five times a year, across my whole upper face,’ she says. ‘One day I looked in the mirror and realised that my face had two ages.‘