Should I just leave it for now? Another 3 yr old DS still in nappies...

[Pannacotta]

DS1 was 3 just before Xmas and is showing lots of signs of being ready to potty train -knows when he is doing a wee/poo and disappears off soemwhere private when he does a poo. But he's not keen on the potty or the loo/trainer seat.
He asked for pants a while ago and we bought him some and used them a few times but I couldn't deal with mopping up huge puddles of wee every 20 mins (he drinks a lot). DS2 is 7 months and not an easy baby so felt timing wasnt great.
Today I asked him if he wanted to wear pants and he said yes, but so far we have had about 4 or 5 wees on the floor and none in the potty even though he has sat on it.
He has gone shopping with DH who put a nappy on him.
What would you do? Any advice/sympathy most welcome....

Hunker yes both registered but both have let me know they'd prefer him out of nappies (in nursery its once he moves to the next room as they don't have nappy facilities there, they'll have to take him to his previous room to change him).
The playgroup don't ever change his nappy while he's there, often when I collect him his nappy is v wet and almost falling off, which isnt great.
The told me when he was accepted that they preferred kids to be dry but they were fine with wet accidents, no mention made of if he does a poo. Not ideal but wasnt sure how to respond in either case.

And thanks Sidge, helps to know that. Am pretty sure he isn't quite at that stage now.