I found this thread looking for information about exactly this lock. Having bought it from Screwfix specifically because it was listed as 'fire rated', I was surprised to find no standard markings on the product or information in the box. I've gone back to Screwfix and asked them to provide more information about the product and will see if they come up with anything, but I think it'll have to go back as anyone who inspects it will probably find it lacking.
I'm aiming to replace another marking-less, non-compliant lock of the same style that was flagged during a recent fire door survey (and which was non-compliant when installed in 2008, frustratingly) but the only other similar lock I can find which looks like it will genuinely be certified is the Banham FD5000 roller bolt night latch, which is over £300 and seems like overkill, but I suppose that'd still be cheaper than totally replacing the door. I think I'll have to do more research on whether the leaf has already been wrecked by the hole for the original lock though. Wildly frustrating that it wasn't done right when it was built and was signed off anyway.
