Thank you for all your supporting comments.
The irony is my actual show - JetSled - stock was outside the show in my trailer and was secure and all still there when I got back on Sunday morning!!
Yes everything was in the JetSled on the quad JS1Trailer(r) but covered over so you could not see what was in there.
The call to the winchshop to tell them the winch the specially delivered to me Saturday morning for the demo had been stolen from me was not a great call.
Yes I have insurance and can claim, but its the actual "theft" that has upset me most, I could have stayed outside and just sold my JetSleds, I did the demo to add value to the show itself and that effort has cost me...
We shall see how Staffordshire Police get on with the CCTV images and serial numbers being circulated on the National Stolen Plant Register etc....