Hi
As you are training to work on gas. You will understand why nobody on here can give advice on a forum that the public can see. This could encourage people without the correct knowledge to have a go themselves.
Stay with us and keep posting. Maybe help others, ask questions about none gas related subjects.
Once you have over 10 posts and have your initial gas safe. Join the sub forum, for registered engineers. Here you will find some great help and advice.