I do wonder if it's just age, Ada has now spent a couple of nights on her bed under the stairs and has slept 10.30 until 7 ish on her own. At the moment she's still needing a bit of help settling, so she's managed to go off to sleep on her own once, but other night's we've left her and had to go back down and sit with her for 5 mins. I think I'm more confident now that we'll get there in time.
Plan is to carry on leaving her, if she's gets out of her bed and hasn't gone back in 5 mins one of us will sit with her until she's asleep. We know she can go to sleep on her own as she does it in the day, we just need to get that bedtime routine sorted. She goes straight to bed when we get the bedtime biscuits out after last wees.
We've been to the vet for flea treatment today, she now weighs 21kg so growth has slowed right down as expected.
Dates for the next stage of our gundog course released next week, need to decide if we want to continue or not. Not even halfway through the current one so it's hard to know whether it's worth continuing. She certainly doesn't seem to have a retriever instinct or any sort of great desire to carry something in her mouth (unless it's something she shouldn't have!)