DM stated (yes, I know it is the Mail, I'm just putting them on record). He's done in September:
"
For as soon as William returns to work following his two weeks’ statutory paternity leave, Kate plans to depart for her parents’ mansion in Berkshire.
She will reside there - on and off - for the next six weeks, while her husband completes his present tour of duty with the RAF in Anglesey, North Wales.
The prince will finish his posting as a Search and Rescue pilot at RAF Valley in early September, relocating to London while waiting for his next assignment, meaning the couple can enjoy some quality time together as a new family."