My dd is 10 and very responsible. However, she has asked several times if she can stay at home while I pop to the shops etc. (a five minute walkaway). I am not sure what the ruling on this is. There seems to be no restiction on the age for letting them go out unattended but I am sure there is one for leaving them alone. Also, what age can she look after her little brother (19mths). Not in a hurry to let her do this but might as well ask while I am on the subject!