You have my sympathies Archie.
How can a company be big enough to justify multiple levels of seniority in it's IT dept, yet be small enough to have a network which doesn't require VLAN's?
To have a manager who cannot understand their use is frightening, how many clots like him are there out there in IT management? I take it the company is now out of business? Did he move the corporate internet connection to TalkTalk to save money?