Hi All! re the above query, Mr Haynes says info will be on disks.... well it's not! I've ground (grinded?) the lips off the edge of the disks and measured the thickness as 23.5mm. Anyone know if that's good, thanks!
btw, car is a MY99 Classic Sport Wagon.
Stop press! Upon submitting this post 2 'related topics' came up and it seems that 24mm is thickness when new, and 22mm is min thickness, so all seems good👍

 

Autodata says 22mm is the minimum allowed