Hi Bloss. Only just seen this, so hope can add something useful. Afraid it's turned into a bit of an essay!
DS1 (who'll be 8 in 3 weeks) wasn't at all interested in daytime training, though did it in about 10 days a couple of months before 3. He did have accidents (not many 'full ones') and even now sometimes will leave it so late that he wees uncontrollably all over the floor. He still seems sometimes to go from "I don't need to go" to "I need to go and nothing will stop me" in about 5 minutes.
He also had a brief phase of pooh accidents around the time he turned 4 and started school, having not had any since he was first clean/dry. We haven't had any since though.
Night-time wetting: He often used to double or triple wet at night - the Pull-Up would sometimes have leaked when we went to bed and we'd have to strip sheets, or he would wake in the night/early in the morning wet despite the Pull-Up.
As far as the clinic goes, we first went at just over 6.5 and he really wasn't interested - at this stage he was probably dry 2-3 times a week, but it wasn't consistent. When we walked out he said, "Can we stop talking about bladders now?". But that was the first time I think he realised that being dry at night was normal and desirable. I'd been so careful to avoid making him anxious that he hadn't even realised most children didn't need Pull-Ups anymore.
They gave us some useful general bladder advice: Aim for 6-8 drinks a day, and limit drinks after about 6 pm
No fizzy drinks (even water), chocolate drinks, blackcurrant drinks. We found that milk at bedtime made things worse and he got drier after we changed to water and a biscuit.
The enuresis nurse said we shouldn't try an alarm unless he wanted to be dry, because it is very disruptive and if it didn't work, he would feel unconfident later when he did want to try. She called us 6 months later (7y1m) and we agreed to leave it another 6 months, as he still didn't want to try.
Then in December (7y3m) I realised his Pull-Ups were mostly dry and started counting. When I realised he had had 7 dry nights we left off the Pull-Ups. Since then, the 3 wet nights I mentioned.
I'm very relieved as he has a residential trip next year! For a long time I thought it would never happen and then suddenly it just did.
Hope some of this is useful and/or reassuring and sorry it turned out so long. F