"It cannot be sold, therefore, or privatised. Unless the Government changes the Law on Trust Ports." Not true.
The government changed the law in 1991 specifically to facilitate the privatisation of trust ports under the Ports Act. (FACT) You can get more facts about the legal situation from the following House of Commons briefing paper:
http://www.parliament.uk/Templates/BriefingPapers/Pages/BPPdfDownload.aspx?bp-id=sn00010
Alex, you really need to inform yourself a little better if you want to make a meaningful contribution to the Port debate.
Happy New Year.