Switching frequency when receiving an ATC service on Expert

Hi all, just a quick reminder which I hope will make for a smoother flight (for some).

If you’re on Expert and receiving a service from an Approach controller for an ILS, you must be established on the ILS before the controller will issue a frequency change. Please dont request one or just switch frequency. This just adds to everyone’s workload (including yours if you are asked to switch back) it may even increase the risk of a missed approach.

Thank you :)