I passed by Zone H in Terminal 5 yesterday and noticed a change. Tall blue signs for "Priority Check-In" were replaced with black ones. The signs displayed "Club World / Europe" and "Executive Club Silver" along with the OW Emerald and Sapphire ovals. No mention of Bronze or Ruby. I found this to be a bit curious, but I didn't ask about it as I was travelling HBO at the time. No mention of it on the website, and earlier this month there were definitely blue signs referencing Bronze and Ruby.

Given the queue in Zone H when I used it on 1 June, I wouldn't be surprised if BA felt the need to restrict it. Not all that fussed myself as I'm planning to go for Silver this year, but nevertheless interesting.