Hey there - Congratulations! Those are some fab grades ^-^
It might be best to take a look at what the Uni's your interested in for Medicine are asking for this year. They might change between years, but it will help give a good idea of whether a remark is worth it for you!
Ultimately Remarks can result in a slightly higher or slightly lower score, and its the grade boundary that matters more then the mark achieved so that's worth considering too.
For UoN for example, we look for at least 6 GCSEs grade 7 or above (Which you appear to have!), and then some specific requirements with a 7 in Biology and Chemistry, as well as a 6 in Maths and English at minimum.
GCSE Requirements are often fairly clearly signposted on the prospectus page, so it's well worth a look and if in doubt - Ask! Most universities will have enquiry teams happy to give you a bit more information about it if the prospectus page raises any questions.
Whatever you pick, good luck and congrats once again! It's a big achievement to complete your GCSE's whatever the marks, so be proud of yourself 🥳
All the best ^-^
UoN Rep - Dan