For an entry level type role we are generally looking for NVQ2 level, or equivalent - which is essentially five GCSEs at Grade A-C.
All roles state the specific qualification level required, and indicate the previous experience that is also typically required of the successful candidate. You must as a minimum meet the qualifications and experience in order to get past the initial short listing stage.
If you are unsure if a qualification you hold is relevant to the role you can check equivalencies on the Register of Regulated Qualifications website.
If a role profile states the successful applicant has quite a generic qualification e.g. NVQ level 3 then the qualification can be in any subject from Accountancy to Zoology, but if the role profiled asks for a specific level of qualification e.g. Grade C in English then you must be able to demonstrate you have that specific grade.