I found a Roam speaker at Gatwick Airport

Hello ​@SteveFlan, welcome to the Sonos Community!

How nice of you to share this information with us! I hope the owner is still somewhere in the UK.

I would suggest you give the Sonos Roam to the police. There is a process to be followed and the police along with Sonos can follow through to find the owner.

I hope this helps.