Heres a step by step guide that you can follow:
1. Go on complete university guide
2. Select the computer science section
3. Click on the university at the top
4. Look at the entry requirements
5. Repeat until you find a decent university that will accept you.
To answer your question, yes a few of the top universities will accept you like lancaster, loughborough and bath. You can apply to durham, birminham and manchester if you do A level maths alongside your btec.