Recently finished my gas theory with Andy Sibley and I can’t praise him enough. Andy has been a gas engineer for as long as I’ve been alive, but not only does he know his stuff, he’s also a great teacher (which is often the hard part). He is great at breaking subjects down and explaining in ways you can easily understand. He also takes time to answer any questions you have. The sessions are fun and interactive, not the usual death by PowerPoint. Learnt more than I ever thought I would. What a great asset to have access.