Old bags of plaster (Brixton Hill SW2)

1 very heavy unopened large bag of Thistle Multi-Finish plaster with use-by date of 30-06-2005 (feels a bit solid at the bottom of the sack), 1 opened and half-used bag of Thistle Bonding Coat with use-by date of May 2005 (still powder), 1 smaller bag of Thistle Multi-Finish plaster in a disintegrating plastic bag (also still powder). I suspect these should probably go to landfill because of their age and condition but thought I'd check if they're of any interest to Freeglers first. Collect from SW2 2BT