The Duke and Duchess of Cambridge watch the disbandment parade for the RAF Search and Rescue in Anglesey today
(photo Cpl Rob Travis/ UK MOD Crown Copyright 2016)
They had of course lived on the island while William carried out duties as a Search and Rescue pilot. He was involved in 156 missions and helped 149 people. And the future king looked pensive as the parade took place - it marks the closing of a chapter in his life as well.
In fact, it was a big moment for both royals with Kate later telling some of those she met that Anglesey was ''the start of our life together, really''. Kate and William moved there after their wedding and would only head off to London then Norfolk following the arrival of Prince George.
In keeping with the theme of the day, the couple arrived by helicopter (with slightly less rows about Kate using this mode of transport than her most recent trip in one when she flew from Norfolk to London for an engagement). And they took pride of place at the Disbandment Parade - Search and Rescue is now to be privatised.
The couple had a chance to speak to pilots and their families afterwards where they shared memories and stories with the duchess sipping orange juice (cue pregnancy rumours all round. Again).
Kate went for red for this trip down memory lane - we've seen the LK Bennett coat before and the Lock & Co hat but not together.But while she may have been recycling her wardrobe, today was more about the emotional past for the duchess and William and Kate headed back to the first place they called home together.