Thanks for your help!
We do have a bed for our dog but it is right beside our table. He knows he has to sit on it but seriously has big shoe laces coming out of his mouth because he wants the food so much. Maybe we will have to move his bed away when we are eating! We put him outside but he is a GSP and oh boy does he cry. Bad enough for us to feel sorry for the neighbours!
As for telling him to leave food he is very good at it. We can tell him to leave a bone or a piece of meat or anything and he will. It is the times where we just put something down and walk away that he will take it. Our dog is not allowed on the carpet yet he will travel 5-6 metres over it to take a piece of cake left on a plate on the coffee table.