That's a good idea but when people still think it's Corgi as Riley said, you now want to confuse them with a list of checks?Do you think there should be a guide price and list of tests/checks that should be completed for standard jobs such as boiler service, fitting a cooker, safety checks.
Set out by gas safe and available for the public
To be fair, it's customers who have their head in the sand: the Gas Safe Register logo is on all these vans. When was the last time Joe Public saw the Corgi logo?