whilst the weather is soo nice, go nappy less in garden for few days. Take a potty outside and just let them know that its there. If you have a boy then let him pee in corner/bushes! They love it and it gets them out of nappies, stand up peeing straight off and when you get back into house they go straight to using loo. Could reward with star/choccy button/jelly baby everytime they pee, loads of cheers & hugs good too. If having hassles then may be delay for few more weeks, its honestly not supposed to be too stressful. Good luck x