Superdrug was the last place I shopped, which was earlier today, when I bought a Oral B toothbrush bundle, £20 for toothbrush & Oral B Pro toothpaste.
This year I have done all my shopping from this store online, maybe once a month. I like that you only have to spend £10 to get delivery. Plus you get points, I have £8 so far. I usual coincide my shopping to match an offer on this site and the code(s) have always worked.
Normally they take 3 - 5 working days to deliver, longer back in the 1st lockdown but they informed you of that on the site.
Sorry can't comment on returns as I haven't used this service.