Imperial, UCL, and Cambridge yes. Imperial and UCL just require minimum grades in English and for UCL, maths, and thereafter don't score GCSEs. Cambridge do consider GCSEs but review them holistically and in context with the rest of your application so it would be possible.
Oxford however shortlist entirely on the basis of GCSEs and BMAT score, and without all 8/9 grades across the board you wouldn't be competitive for Oxford. But as above, there are plenty of medical schools that just have minimum GCSE requirements and don't score GCSEs otherwise you can apply to.