I was caught doing 89.93mph over 3/4 of a mile on a single carriageway almost 9 years ago. I had to appear in court and was given 5 points, and ordered to pay £160 fine and £40 court costs.
Not sure what you could expect for your speeding offence though, good luck anyway
EDITED to say, I tried to plead guilty by post as the court was in Grantham and I lived near Newcastle, but was told I HAD to appear in court