Gas gain training centre Mansfield

[Tommo25]

I was told about a training centre in Mansfield (near Derby and Nottingham) I heard about it through a gas engineer at work, does anyone have any experience with the training centre?

I was was told that you build a portfolio of work and then can take your gas exams?

Wanted to get some opinions, I'm a little skeptical after reading about all the scam and short cut courses people have mentioned

thanks for the advice