Qualifications improve your chances; they do not gate the job. Level 3 is the most recognised.
Level 3 most recognisedOpen entry
Your route in
Employers typically expect around L3
1
Qualifications employers recognise (Level 3)
Any of these strengthens your application.
2
Add-on certificates
Complements to the main route. Where no level is shown, the awarding body does not specify one.
3
Where this can take you
L2/L3 electrical installation apprenticeship then qualified electrician (ECS card), then City & Guilds 2391 Level 3 Inspection & Testing to specialise in testing/certification.