When booking an appointment it is for a AM or PM time frame. Your engineer will call you when leaving the job before to say he is on his way.
For example, if you book the A.M slot your engineer will be there between 8am & 1pm. If you book the PM slot your engineer will be there between 12pm & 4pm
Please see the call out / labour charges as set out below. These charges include VAT and you only have to pay for parts if any are needed.