My five year old son who has been potty trained since 2 1/2 has suddenly started having poo accidents in his pants. He started school 4 weeks ago and seems to have settled in very well and seems happy but says he keeps 'forgetting'. He did take 6 months to originally stop doing this when potty training but has nearly been 3 years since previous accidents. He has had 3 accidents in 3 days and I am starting to lose my patients. Have tried to remain calm and not make fuss so far.Suggestions would be gratefully recieved!