I've just found the reducing plan the GP gave me when I was.prescribed Prednisolone. 15mg starting dose, after 3 weeks reduce to 12.5mg, another 3 weeks reduce to 10mg, then aim to reduce 1mg every 3 weeks but increase by 1mg if it starts to flare. That makes approx 36 weeks in total.
I haven't found it effective so far, I wondered what others think of this schedule