Extended diploma in applied sceinceWatch
These qualifications are more 'vocational' and practical in focus, and are not as heavily 'academic' as A levels.
For this reason many Universities will not always accept them, others may insist on certain units within them, or only accept them alongside an A level.
In terms of Medicine, no University will accept this qualification on its own for a 5 year Medicine degree.
However, you may find that Foundation courses, and Gateway to Medicine courses, will accept this.
For instance, the Gateway to Medicine course at Bristol is a 6 year degree (1 year 'Gateway' course and then automatic entry to the 5 year Medicine degree), and is a 'widening participation course' meaning you are only eligible if you went to a low-performing state school and do not have the grades/qualifications to apply for direct entry to the 5 year course.
For the 5 year course at Bristol the BTEC Entry requirement is 'DDD in Applied Science (Biomedical) plus A-level Chemistry. Distinctions may be requested in specified units' - so you could think about doing A level Chemistry later if you did get good enough BTEC grades. OR for the Gateway program its 'DMM in an Applied Sciences, Medical Sciences, or Health and Social Care (Science pathway)' (without the need for the additional A level).
This is just one example - lots of other Universities have similar 'entry routes' to Medicine that may be appropriate for your qualifications.