@AnUtterIdiot I got mine from primark. They weren’t maternity pants, I just chose the biggest style of pants they do and bought them 2 sizes too big. The Midwife nodded her approval of them when she was checking my scar.
I got some Asda high waisted cotton briefs. I didn't have a section but found by the end of my pregnancy I was longing to be in some big knickers . I was a 12 at the time and got a 16, they were so fab and comfy I still sleep in them now! Good luck OP.
Yet another vote for primary high waisted ones- I bought them when I was told I'd probably need a section- in the end I had a vaginal delivery but forceps and episiotomy. I'm wearing a pair of the Primani pants now and they're v comfortable!!