New tenant is two months in to a six month let (to be extended after 6 months) No issues before, although he does have a weird habit of leaving all the lights on all the time (the property we let to him is visible from our house). He has a regular job, and it's his electricity bill, but I still find it a bit odd. He has been away for at least a couple of weeks now with all the lights still on. I sent him a nice text asking him if he would mind me going in and turning the lights off (concerned about overheating / electrical problem) I waited for two days with no answer. I then went over there, thinking he may be ill, to discover he has changed the locks (as is his right) but without telling me. As the owner of the property, I feel a bit uneasy about this. Don't I have the right to a set of keys? I would never enter the property without the tenant's consent, but in the case of an emergency, there is nothing I can do without keys. Not sure what to do now re lights. Am I being overly cautious and worried over nothing? I've been letting this property for six years (two different tenants in that time) with absolutely no problems whatsoever. I have always had keys.