.... update (for people who more visit this thread in the future).
Following our Bank Holiday success in May, things went backwards the next week. Ds will not do anything in the toilet unless he is taken to the toilet. He will then pull down pants and do a wee (most of the time). He will not do poos. Not under any situation.
He insists on doing poos in his pants and usually while he is at nursery. The nursery have finally issued us a letter saying that this is not acceptable (their policy is that a child should be at least partially trained) and we've decided to take him out of nursery.
This is very bad news for ds as he really enjoys nursery, but we think he really likes the attention he gets by doing poos in his pants.
We will also give up his place for nursery in Septemeber if he doesn't improve.
The last few days have been very bad, and ds refuses to go to the bathroom unless physically carried and placed in front on the toilet. He then calms down and gets on with it.
Current plan is to be calm, non threatening and go with the flow. If he's not ready then he's not ready.
When he poos in his pants, we talk calmly to him and give him plenty of time to cover the same conversation about where poos go. He also gets plenty of our attention all the time and especially when he manages to wee in the toilet (including gold stars, stickers and mystery gifts).
At the same time, we take him to the toilet on a regular basis saying that it doens't matter if nothing happens - he still gets a star for trying.
I hope that one day it'll click, either physically or mentally and we can get on with life again.
(He is now 3yrs 4 months).