Thanks guys, I do know the theory and it's how I dealt with Normy and I do only call him regularly when he is 'lost' not on normal recalls and generally they don't get praised until they are right where I want them. A lot of Dave's trouble is (and I'll freely hold my hands up here) that I've had to focus so hard on Normy because she was/is the more dangerous and the one with the more extreme problems so he hasn't had as much work put into him as he should have. He's always been very easy and generally bumbles along near me.
He's caught me out to some extent as unlike a dog with a naturally high hunt drive and high energy, he still is most of the time, pretty chilled out and bumbling and doesn't stray far from me. He doesn't get excited or show any of the normal focused hunt signs, when he goes, there is very little, if any warning.. you'll just suddenly realise he'd not there and he'll have quietly and slowly slunk off into the undergrowth and disappeared. He doesn't chase stuff - for example if a deer/squirrel/rabbit is right in front of him, he just looks at it then gets back to bumbling. About the only thing he does chase is Normy, much to her utter annoyance

and obviously scents but that's a slow burn before he gets going.
He's an odd little dog, I've had him checked but I'm still not convinced he has the best eyesight or hearing he's also very hard to get focused on me. A lot of the time it's almost like he's on another planet even when he's in the same room as you

I don't think I'll ever fully understand him but we're definitely going back to basics for a while I think

Jo, I forgot to mention, I had a proper cow bell (the sort your granny buys you as a souvenir when she's on holiday in Austria) on Normy for a while and it was absolutely brilliant. It also seemed to put her off hunting too as if she knew there was no way she could sneak up on anything whilst sounding like Daisy redbull

And also helped us find her a lot more quickly when she did bog off

xx