Thank you.
I like the idea of parallel walking, I know a much older calmer dog, she's a good influence on my ball of energy. I shall start telling my family to walk away as soon as she goes to jump/break sit.
As for walks, she gets a road walk morning and evening after walking through the fields playing frisbee. On leash, I'm mostly super proud. On the main country roads, she's told to heal and she's really good at it, she also knows to jump on the grass verge and wait if a vehicle approaches. On the quieter back lane country roads I tell her to 'go wander' which means she can walk in front and stop and sniff whatever, which she's not allowed to do on the busier roads. Although if she pulls I either stop or make her walk in the opposite direction for a bit. This is hit and miss how well it works, it often frustrates her in to jumping or biting the lead. Food throwing helps but luckily she doesn't pull too hard on wander so we don't have a real issue. She's usually just at the end of her leash, she likes to stop and sniff too much to pull ahead too far. Allowing her to go wander seems to help keep her attention and if need be I can call her back to heal quickly. Our problem arises if we meet other people, which is often rare. Then she's so excited all the excellent leash behaviour she can do goes completely out the window!
As for her jumping and biting during frisbee, I have no idea what causes it. We can be playing frisbee and she'll be sitting before each throw and then suddenly she decides she doesn't want to sit, she wants to play tug with my arm, bum or coat. Sometimes I see a change in her eyes before she goes and I can start throwing food and stop it happening but that is rare. Sometimes she's half way to sitting and then decides jumping is better. It's like we have a battle of wills to see who's going to submit to the other. It's like she says I've done what you've asked for a bit, now do what I want. Occasionally, she drains all my patience and understanding and I have put her leash back on and frog marched her back home but thankfully that is happening less.
I know she'll get there and I remind myself she's still an energetic pup that sometimes just wants to play and get up to a little mischief and even though her best falls short at times, it's still her best and to praise her.
Thank you for all your help and advice. I'm going to start reading the suggested articles to see what else we can work on.