Unfortunately this scenario crops up quite often when I go out to visit clients.
I hear often that electricians turn up hours after they had arranged, or in some cases not at all. This understandably leads to much frustration on the Customers part and a general distrust of electricians in general.
I have to say that this kind of 'problem' is very common within the trade. M.T.R Electrics however pride themselves on professional service and we understand that time is very valuable.