Mine was plated about 4 weeks after the break, it healed pretty well and I was riding within 4 weeks and in the alps in 8. The stuff about the graft is probably worst case scenario.
I still have my plate in 2 yrs on, it can be a pain at times with the snagging of tendons but the consultant decided that there was probably no need to remove it.
You will always get differing opinions from doctors main point is you have been treated, it will probably be ok aand it was free. Dont be too harsh on the NHS.