Advice needed on adjustment of the sockets at the top and bottom of the frame and the plates, which I assume prevent damage to the door frame.
The door frame is square

Many thanks for help
There's the problem then - should be rectangularmillerman wrote:The door frame is square
I am having trouble understanding this bit (my woodwork skills are iffy to say the leastThe top (black )bracket should normally be rebated into the top rail, this will take up the discrepency of fit.