Thanks to everyone for their input.

Quick progress report. Hair loss has improved on my itchy boy. I am unsure whether this is down to me no longer applying the fly repellent roll on or if it's just that the weather has changed again so the midges are not out/SWITCH is working maybe too? Will watch and learn on the next midgy night.
He is still occasionally rubbing along the fence but mostly at ease and chewing the cud quietly.
Still the odd stamping and fidgeting of feet so will definately be applying the pig oil and flowers of sulphur combo at the weekend after a quick leg shampoo (many thanks for the advice clydesdaleclopper)

. I will likely come off the worst during the beauty treatment so wader wellies at the ready.....
Hopefully all will be well again shortly.
Anke - how is your goatling doing now?