Another little tool that can be of use is to check the business VAT registration.
If you have a VAT number, you can currently check the number is legitimate using the EU VIES system.
Alternatively, VAT-Search.co.uk will let you find if a business is VAT registered, using the business name and locality.
Here we find more evidence that JARS Builders is Justin Savage-Rudd (and if we hadn’t already guessed that Savage-Rudd might be a possible search term for Companies House or other searches, well, we know now). We can conclude that the company founders listed on the website are most probably fictitious. Which might lead us to wonder just how much of the other website content is also misleading.