CCN1  - ACS Core Domestic Gas Safety

• CEN1 - central heating boilers
• HTR1 - gas fires
• CKR1 - cookers
• WAT1 - water heaters
• DAH1 - ducted air / warm air units
• MET1 - gas meters
• CPA1 - flue gas analysers

• CORT1 - overhead radiant tubes and plaque heaters
• CIGA1 - commercial boilers and warm air heaters
• CDGA1 - indirect fired (flueless) heaters
• TPCP1A - testing and purging systems < 1 cubic metre
• ICPN1 - first fix pipework

GGFO D1 - Guild of Gas Fitting Operatives

• the basic gas safety foundation course

• COMCAT1 - Catering appliances Table 1
• COMCAT3 - Catering appliances Table 3

CONGLP1 - Changeover from Natural Gas to LPG

• PD - Permanent Dwellings
• RPH - Residential Park Homes
• LAV - Leisure Accommodation Vehicles (Caravans) 
• B - Boats

ELECTRICAL

• Domestic Electrical Installer Course 
• Part P - Electrical Wiring Regulations - Levels A and B
• City & Guilds 2382-12 Level 3 - 17th Edition IEE Wiring Regs
• City & Guilds 2382-20 Level 3 - 17th Edition (update from 16th)
• MEB1 - Main Earth Bonding
• City & Guilds 2377 Portable Appliance Testing (PAT Testing)
• Essential Electrics

OTHER COURSES

• Part L - Energy Efficiency
• UDHW - G3 Unvented Domestic Hot Water Systems
• WRAS - Water Regulations
• CMA2LS - Install primary domestic gas meters 
• CMA1- Install & exchange domestic and commercial gas meters