The mid haul 321s were still marketed as Club World/World Traveller. I seem to remember there was a nod to it in BA.com but officially it wasn’t a different mid haul product.

This applied to the catering - there was no buy onboard etc.

I think there was also some kind of seat back video system (with pretty small screens down the back).

They also worked interchangeably with wide bodied aircraft on some routes, Tel Aviv definitely, maybe Moscow too.