Apologies for the very late reply. A medical emergency, thankfully not mine this time, kind of took over for a while. I am very grateful to everyone for taking the time to respond and pass on their experiences and knowledge. I will do as suggested as there are some very good suggestions above.
Sadly some of his traits are not typically Labrador which would have made life easier. ? He is not really motivated by food or treats and this astounded us having had one previously who was a glutton and would have done anything for it. Would you believe he doesn’t even care for water! We couldn’t keep our last one out of the water and if she could find a ditch full of mud and water it was like she had won the lottery. This ones pedigree is from field and gun dog champions so we were really surprised. Just goes to show. ?