Cooee Jackie
If you are referring to the newspaper article PH makes no ref to Scotland Yard. The article refers to "a contact in Police Scotland". This is more than likely a local bobby on PH's home island of Sanday (Orkney, Scotland). Sanday has less than 500 inhabitants. PH is an ex-cop, author of true crime and runs a bed and breakfast on Sanday, so the chances are he will be on first name terms with the local police and most of the inhabitants. Regardless "Police Scotland" is not "Scotland Yard".
Jackie I think you are wasting your time/money pursuing the matter legally until you have exhausted a formal complaint with Express newspapers. The journalist responsible for the article, Ben Borland, is in fact editor of Express Scotland. The Express group is owned by Northern and Shell whose HO is in the City. I would recommend that you put your case together, as you see it, and visit their offices to make a formal complaint. If you don't get any joy and you still believe you have been wronged then take it up with the press complaints commission:
http://www.pcc.org.uk/advice/index.htmlI would offer to help you but I didn't see all the pm's/emails so perhaps NGB might be able to help if you feel you need help.