Express haven't stocked Saffire for years, they moved to Gloria and a bit of Amerex for a few years but are now stocking Total as their premium (kitemarked) product and Delei Fire (China) for CE marked 'cheap as chips' stuff & polished finishes.
I agree that TG's carts are now just re-badged FAC stuff. They've had trouble before over the years with cartridges, diptubes and at one point I had a glut of the last ever version of their Series 2000 AFFF models (that had the plastic 'ribbed' nozzle rather than the brass nozzle) acting as a riot control weapon - when discharge tested the ribbed nozzle shot off like a baton round, fortunately missing hitting anyone. All the units were in office type environments in different premises & not where they were likely to have been damaged prior to discharge. Needless to say it put the users off them somewhat & I replaced them all with Britannia Triclass models. Oddly they were also all Kidde Thorn branded models, not the generic TG label from independents.