Just as an fyi … for anyone else - the key steps.
Not the only way, but worked for me.
I used 3 special tools
7mm Allen key socket
14mm XZN triple square socket
OBDII Code Reader
Connect up battery charger to battery (important step)
Release EPB
Retract EPB with code reader
Jack car wheel up high (wheel about 10” off floor)
Remove wheel
Remove plastic end plugs from Calliper pins
Unscrew & Calliper pins
Push piston back fully by levering with a screwdriver between pads & disc.
(No need for a retractor tool … simply push fully back)
Lift off calliper and temporary tie up with cable tie to avoid straining brake line.
Remove brake shoes
Remove the 2 x Calliper fixing bolts ( technically they are screws) this was hardest part, I applied heat with a micro gas burner to heat up heads, in the hope it softened thread lock.
Take out the Torx screw that holds on disc.
Screw in 1 x wheel screw … to avoid disc dropping out when it becomes free
I applied dismantling fluid around where disc fits on central hub … then some suitable wallops with a hammer to remove
I cleaned area up with brake cleaner, removed any corrosion on hub face, and applied very thin coating of ceramic grease (used a brush to ensure very thin), also applied to ‘ears’’ on new brake pads, and the rear of pad where piston makes contact.
Also sprayed rubber boot of piston with silicone spray.
Cleaned new disc faces with brake cleaner … and fitted
When fitting new Calliper frame bolts, I added Blue thread lock to the first 25mm.
Redid all screws to correct torque.
Release EPB with code reader
Light short strokes on foot brake to reset pads.
road test.
check code reader for any alarms.