According to my Girling catalogue the brakes appear to be Type HW and this item is listed as a Draw Link part number 481845.
The mass production application was Rover 80, 90, 100, 3 Litre and 3.5 P5B.

Hope this helps

Jack

Jack
1985 4/4 T/C 4 seater Royal Ivory
1934 F Type
2018 Pembleton SuperSport (self built).