Yeah i think the warmer weather will do them good.
DD2 had nappy off after lunch, sat on the potty but wasn't really interested then asked for the toilet, i put the potty over the toilet and low and behold WEE's.
So she's in a nappy for her slepe but i've left the potty over the toilet and will let her run naked once she wakes up.
I think having her big sister be so encouraging is helping too