We buy them on eBay, a search for; Replacements Heads for Oral B Electric Toothbrush gives multiple sellers, some UK ones. We have bought from both UK based and China and never had any problems. The packaging can differ but the heads are all fine. We get the Medium bristle and the occasional pack of Firm. We have never paid more than 50p per head, sometimes only 40p. Read the sellers feedback.
Hope this helps save people money, its not much if its just one or 2 people but when you have 5 people in the house and know of another 3 Families then its not hard to work out the potential savings, especially if you are happy with a suppliers product, message them for a special price for 100 heads. LOL there's a minimum £50 saved on a discounted/reduced Branded Item version.

Perhaps these

https://www.lidl.co.uk/en/Non-Food-Offers.htm?articleId=2162

Just bought from Trafford centre store, none on the shelves, their next to the tills !!!!!

Would theses fit a braun oral-b

thank you!

just dont get these on ebay

​http://www.superdrug.com/Oral-B/Oral-B-Precision-Clean-Replacement-Toothbrush-Heads-x4/p/215469?

I am getting £9.48 for each of these. How do you get £7.99? Am I missing something here?

Thanks. I ordered some. Get free standard delivery for orders of more than £10.

Good price thanks op.

Thanks OP I and my family have been using Oral B electric toothbrushes for over a decade and third party Toothbrush heads are just as good as originals and a LOT cheaper

If i wer you id lead with the other 3 links as they are half price and great value. Heat added.