DS decided to toilet train just before 2 but would "forget" to let us know at times. I decided just to go for it around 2 and threw the nappies away. He hated wet clothes so often would start and then take himself off to the toilet (wouldn't bother if he had a nappy on) but if we were out I would take him every hour to start with (he likes error-less learning!) on the pretense that I needed to go, and perhaps he could go to. I did that for a month or so. It was very quick in our household too (wee to start with). He hated the potty and would only wee into the toilet from a step. He continued to ask for a nappy to do a poo in until he was closer to 4 as he refused to sit on the potty and was scared of falling into the toilet...
In the end though it was good old fashioned bribery that did it - once he had done 5 poos in the toilet he could choose a toy at the shops. Why didn't I resort to that earlier...? smile