Hi K-LEE
Whereabouts were you 'done' ....?
Were you given a ticket at the roadside or was it a camera ?
If you're in Scotland and are caught doing 20mph or more above the road limit, you can't be given the option of a roadside fine .... but that'd have been made obvious to you if it were cops who stopped you ....
20mph or more above the road limit in Scotland gets you automatically reported to the Procurator Fiscal .... he can then change the charge if he wishes to one of either 'dangerous' or 'careless driving' taking into account the road/traffic/weather conditions. time of day, where the offence took place, i.e. near schools, hospitals etc ....
On the other hand, given the courts are 'up to their eyes' in it, an offer of fixed penalty may be issued which can be dealt with by post .... the above factors will then be a consideration in the level of fine and penalty points imposed ....
As I say, that's for Scotland but there may be similarities across the rest of the UK ....
Hope this helps.
S