Ah, so "Barry" refers to the city of Barry. Thank you.

I found it here on Warsailors, just a few examples: https://www.warsailors.com/convoys/sc16.html "Commodore was in Hartington, Vice Commodore in Swinburne. Barry Commodore in Sirikishna." https://www.warsailors.com/convoys/hx97.html "Commodore was in City of Bedford, Vice Commodore in Scottich Monar...

What is, exactly, the meaning of the term "barry commodore" in a convoy?