Basically, no.
Medicine (as in, becoming a physician/surgeon) is necessarily an academic endeavour. You will be constantly examined throughout your medical degree, and beyond - if you aren't able to cope with the teaching/exam format of A-levels, the lecture/exam format (and subsequently it seems, cramming for exams while ostensibly in full time work) of medicine is likely to make it an unrealistic goal. You realistically need to be able to do three A-levels, including two science A-levels (typically chemistry and biology, although the former is pretty universal even if the latter is more variable) to demonstrate a basic ability to cope with a full academic workload.
Of course, this isn't to say you can't work in the medical field without pursuing such a purely academic path - there are many allied health professions, basically all of which are actively trying to recruit, which have various pathways (degrees, HNDs, apprenticeships, so on and so forth) to go into. You may want to look through the NHS careers site and see what roles are available, and what suits your interests. While many of these do entail degree study or similar, the nature of the courses is more practically oriented to the job you'll be ultimately performing, and there is less emphasis on the formal scientific underpinnings (which is critical to a medical degree on the other hand).