GCSE's at grade 4 or above in English and maths (or functional skills level 2)
Ideally a level 2 qualification in plumbing
A suitable Gas Safe registered employer who is competent in the areas you wish to undertake and is able to start you as an apprentice.
Individual employers will decide on the selection criteria for their apprentices, which typically includes the above. You will need to register your Gas Safety qualification on their register before being entered for your level 3 end point qualification.
The course is assessed using theory exams, portfolio of evidence and practical observations in the centre. You are also required to complete an ACS assessment in the centre before the end point assessment of the level 3 qualification.