Setting away mode automatically on Evohome

Hi all, is there a way to get the Evohome system to automatically be set to away mode based on certain conditions? We have daily schedules setup but I need this for the scenarios where we are out straight after work and don't get home until later in the night. In these scenarios, the heating is turning on as per the schedule and what I want is for the system to be set to away mode.

Would appreciate any advice.

TIA