I uber praise and reward when she does it outside and I'm just ignoring her when she does it inside.
Brilliant!

Sorry Nimue, maybe mega praise would be better English.Am I reading this right that she's ok on a night? It's in the daytime she's doing this.........gosh at 4 months my pups only hold their pee if I'm up at 4am to take them out, which is what I always do,
Yes she is, slight cheat going to bed late and getting up early and I doze early morning and evenings to catch up. Very late this evening but normally about 6 hours, long "summer" days mean she wakes early There should be plenty of her scent already in the garden from her and her siblings going outside, I use the newspaper trick for pups I have not bred and it does work, won't do any harm I guess, but the garden should already be her familiar territory.
I envy you, you must live in a much dryer place than me. I'd me amazed if any scent outside from her siblings remains but her Mother is here so no real excuses. I think you just have to ramp up calling her outside, *every hour,* and as said, as soon as waking, eating, after play.......... and with a nice big umbrella over you both if raining. My pups are like ducklings, I call pee, pee and they follow me, do their business and come back in.
Well worth a try, many thanks.Continue with praise, praise, praise,
Just to check, if you are using disinfectant to mop up her pee, that will entice her to carry on going there too. You need to use some non-bio washing powder to neutralize her smell, and don't think anything of picking her up quickly to make her finish outside, done that a few times, with loads of good girls of course.
By jove that could be the very answer I'm looking for. It is really early days though, she's still a baby, they can't hold themselves at this age, and some pups take longer to learn, it is very rare for a pup to be clean at 4 months, very rare..........6-12 months would be waning, but not before that, believe me, your other pups will be just the same.
Maybe my addled middle aged brain and the fact she was born here is confusing my memory and I'm comparing her with older pups in the past.