We currently provide services and support to companies and individuals in Humberside, East Yorkshire, North Lincolnshire, North East Lincolnshire, South Yorkshire, West Yorkshire, Teeside, London, Portsmouth, Plymouth, Southampton, Hampshire, Oxfordshire and Wales.

Domestic Gas Appliance Assessment


CKR1                Domestic Gas Cookers Appliances
HTR1                Domestic Open Balanced and Fan Assisted Flued Gas                         Fires and Wall Heaters
WAT1               Domestic Gas Instantaneous Water Heated                         Appliances
CEN1                Domestic Gas Fired Central Heating / Hot Water                         Boilers and Circulators up to 60kW
DAH1                Domestic Gas Fired Ducted Air Heaters up to 60kW
MET1                Meters
CPA1                Combustion Performance Analysis
Next stop…..
CCN1 Assessment or New Entrants into the Gas Industry

Our Website

This website explains how we approach, develop and implement activities and why we are recognised for our free flowing, informative delivery, bringing information alive by adopting a specialist approach for organisations. Select from the top to access our range of management courses, electrical courses, plumbing courses, air-conditioning and refrigeration courses, f-gas regulations course, ACS gas domestic, commercial & new entrants training & assessment and NEBOSH general certificate and various health & safety courses.





Freelance Assessors required in plumbing, air-conditioning, refrigeration, gas and electrical. Please email your CV and state which field of expertise you can cover.






Head Office:

Crownship Developments Ltd,

Charlton House Mews,

Bridge Street, Brigg,

North Lincolnshire,

DN20 8NQ


Technical Centre:

Crownship Technical,

Unit 13,

Temple Street Unit Factory Estate,

Station Drive,




Telephone Number: 01652 658151

Fax Number: 01652 658221



Valid XHTML 1.0 Transitional Valid CSS!

Recent Testimonials

Here is some of our satisfied customers.