eah, the 6035 is where you learn what you need to know in order to gain your NVQ. The 6189 is just proof that you’ve proven you can do what you’ve learnt in the real world.
No it isn't I am afraid, the 6035 or any college based learning is just the theory that underlies the skills you gain from work.
Did you have to be working alongside a qualified a plumber when the assessments were done or was it just a case of getting your work signed off for your portfolio?
Are you asking if he & his work place recorder cheated & didn't complete the NVQ as required?
@chris watkins the 6035 certificate replaced 6129 back in 2012. As far as I know the 6129 is still recognised but no longer taught. I assume the 6035 will still be a recognised qualification as it’s still being taught.