AOG....
// Please explain why since being in the EU we have lost most of
our fishing fleets... //
We haven’t. We have 6,406 boats employing 12,,445 people. That is about 10% less than 10 years ago, but the tonnage of fish caught is about the same.
// Our ship building… //
Was privatised in 1983 to foreign companies who took the work abroad. The Government is building less warships. The North Sea Oil boom has gone and Cruise liners are built by the lowest bidder, usually Korean.
// Our steel industry… //
Was privatised in 1988. It was merged with a Dutch Company before being bought by an Indian Billionaire.
// Our ports… //
We haven’t lost most of our Ports. Obviously air freight has increased but we have opened Super Container docks more recently. Here is a list of our ports.
http://en.wikipedia.org/wiki/List_of_ports_in_England_and_Wales
// Our power providers are now all foreign owned… //
Because they were sold to foreign companies by the Conservative Government in the 1980s.
None of changes you have highlighted are due to our EU membership. They were either the result of policies of the Government of the day, or have not occurred at all.