Additional prep time between appointments

Apologies if this has already been asked.. I've had a quick look and can't find the answer to my question.

I have a client (service provider) who I have set up the Appointments+ plugin for. He needs to have time automatically added on the end of an appointment when it is booked so that another appointment can't be booked immediately after. His standard appointment time is 60mins, although he requires an additional 30mins prep time in between appointments.

Is there a simple way to implement this?

Ta :slight_smile:
K