I'd walked past these panels several times while working on projects nearby, and had assumed they were traditional panels from another building repurposed as privacy screens. In actual fact, they were made in Blairgowrie sometime in the last 20-30 years.
When the windows were originally installed, insufficient support was included and as a result the panels had bowed. The client wanted to install slimline double glazed units in her sash and case frames, she decided to have repairs done.
I removed the panels to the workshop, (the central panel is 5ft x 4'10!) and released the lower portion of the bowed panels. After a polish, and new tie wires, the panel was reinstalled. This was fairly tricky, as the glazing company had routed out most of the frame to install the slimline glazing, leaving a 7mm lip all round. By building a secondary subframe, and fitting new mouldings over this, we were able to reinstate the panels without resizing, and incorporate extra support.