Training Developments Scotland (TDS) are a gas training centre based in Paisley offering a variety of different training courses. We train candidates with no experience or knowledge whatsoever into fully qualified gas engineers in only 28 weeks, giving the same qualifications as a full gas apprenticeship. Our 'CAT2 - Gas Core for Plumbers' course is designed to allow fully qualified plumbers to become gas qualified in as little as 6 weeks.