I’ve got the post surgery m&s bra and it’s soooo comfortable. It’s the black one with the pink zip bit. You can prob get measured there too so you get the right size. You get the vat off when you get to the till too so works out around £20 🙂
Also I’m sure you can have an hour out your sports bra a day.
Iv got nerve damage at the moment and it’s quite uncomfortable so sit 10-15 mins without a bra on a few times a day to relief some pain. I’m 2 and half weeks po and have been doing this since 2 days po and it’s done me no harm. If your unsure though call your nurse and ask her. Good luck on your recovery Hun xx