More generally I’d only really work on it when she had already run off the top layer of her energy. That probably isn’t what a trainer would advise but it worked for us: I let her have a runaround and we’d do some other training or some hedge-diving or whatever, and when she’d done some spanielling then we’d work on lead walking.
Actually @brushingboots that's exactly what our trainer advised! In fact she said she doesn't take her dogs for walks until they're a year old – up until then she focuses on training that tires them out, so she drives them to the beach or the park or whatever and does long-line recall, and then she does lead walking training in the garden or on the driveway where they're calm and safe and it's not too exciting. And then she starts taking them on proper walks once they can walk perfectly on lead. Not practical for us as we have places we need to walk to (the school run twice a day for a start!) but we don't worry about lead training when we're walking to get somewhere and instead only work on it in the garden. It is sort of working... slowly!
Our biggest problem is that we seem to have a preteen! Betty is super smart and picks things up really quickly, but she's also SO stubborn – even at 6 months she quite often knows precisely what we want and just refuses to do it. Her recall is great... right up until there's something more interesting than us / she knows that we want her for something she doesn't want to do (there is a lot more running away from us when we're trying to get her lead on than I would like...!). She's really not food motivated so that doesn't work. Any tips very welcomed!
And a funny (sort of!) story... we were walking with her into the village centre yesterday and on the way, the route takes us past a local house that has lots of toys in the garden – local eccentric, she has old teddies and Barbies and whatnot in her front bed and the village kids stop and pet them, very sweet. Anyway a new addition is a fairly large Paddington standing on the top of the hill of her driveway – so from Betty's perspective it looks about 6 foot tall. She was happily looking around until she spotted the bear – at which point she LEAPT in the air (straight into the thankfully empty road!), dashed off in the opposite direction in a complete panic and spent a good 15 minutes shaking life a leaf in my arms! We managed to persuade her past it again but she would only go if she was right at DP's heels and I walked between her and the bear. Annoyingly she's definitely in her "fear" phase right now and she has been a bit extra-jumpy ever since, poor pup. I'm convinced she's going to be scared of people in hats and welly boots forever more!