Client Reports - New Next Appointment Date Column

It would be really handy to have an extra column added to the client reports (Client List & Client Retention reports) to show the date of any future appointments that client has booked in.

At the minute you can see someone hasn't had an appointment for i.e. 90 days but they may actually be booked in for an appoint in a few days.

We want to start sending "you have not seen in us xx days here is £X off" emails. But don't want to send this to someone who has a booking coming up and not easy to see the date of the next appointment in any reports without manually checking the calendars.