Hi there,
There are quite a few Biological Sciences courses that don't require a second science so I think you'll be okay! I've had a quick look on UCAS and this is what's popping up with their current entry requirements:
Birmingham - ABB with Biology and second science OR AAB with just Biology (needs an A in biology)
Bournemouth - 104-120 UCAS points (BCC-BBB), no specific subject requirements
UWE (Bristol) - 112 UCAS points (BBC) with a minimum C in a science subject
Dundee - year 2 start requires BBC with Biology AND Chemistry, but year 1 entry requires CCC with Biology OR Chemistry
Kingston (London) - 112-128 UCAS points (BBC-ABB) with Biology at a C grade minimum
Nottingham Trent - 104-120 UCAS points (BCC-BBB) with Biology at a C grade minimum
Oxford Brookes - 112 UCAS points (BBC) with at least one science
Reading - BBB with Biology and a second science OR ABB with just Biology (needs a B in Biology)
Salford - 104-112 UCAS points (BCC-BBC) with Biology at a C grade minimum
You also obviously have UEA and London Met which their lovely ambassadors have already given you info for!
Some of the ones I've listed do have slightly different GCSE requirements to the usual 4 in Maths and English, so I'd double check their GCSE requirements too and see if you meet those, but as you can see there are lots of options for you 😁 As well, others have already mentioned the possibility of a foundation year if you don't quite meet the subject requirements of a university you're interested in so it would be worth checking that out too, but don't forget that would be adding on an extra year for you.
Hope this helps and good luck!
Jorja (LJMU Student Rep)