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.


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Domestic Gas Re -Assessments

CCN1 & Any Domestic Appliances

Including 2 Days training, certification fees & up to date gas publication

Package Price £945 + vat

ACS Re Assessment Sceduled Dates 2023 ( Training optional)


Training: 21st & 22nd August 2023

Assessments: 23rd, 24th & 25th August 2023


Training: 9th & 10th October 2023

Assessments: 11th, 12th & 13th October 2023


Training: 20th & 21st November 2023

Assessments: 22nd, 23rd & 24th November 23


Training: 9th & 10th October 2023

Assessments: 11th, 12th & 13th October 2023


Training: 20th & 21st November 2023

Assessments:22nd, 23rd & 24th November 2023



More dates available to suit please call :01652 658151









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



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Recent Testimonials

Here is some of our satisfied customers.