Thanks Umar
It would appear looking at the threads you provided that I cant use the Trustpilot review scores in schema mark up as they are from a 3rd party & google only allows onsite reviews to be displayed via markup................doesnt explain my competitor at Golden Charter is displaying stars in SERPs as they have no onsite reviews!
Which means that i will have to set up a separate method, which will duplicate the Trustpilot work, to capture directly reviews from customers.
Why is like never easy!!
Ash