Company Searching

[cessna l plate]

I am trying to get some information on a former manager of our company who has set up on his own. I want to ensure that he isn't in competition with us anymore, so this is my problem

I can find details about him on the net, but I cannot link that to a company name at all. I have found out that he is a director of 3 different companies, but I need to know the names of them, and I can't find a site that will do this for free, anyone know how to acheive this??

Thanks