Just been down to stow to pick up some bits for the other half. Got caught at about85 by police doing checks on M5. Do you think I will get a ticket ? There were others going pat me at the time 
Did they actually stop you Psychnurse, or was it a mobile camera unit that 'snapped' you?; they do record your number plate, speed, date, time, etc.
If you were stopped were you told that you would be reported for speeding, and if so what speed did they record?
Some years ago motorway police only generally bothered with any vehicle that was exceeding 90 mph, unless being driven "dangerously" or "recklessly". However, a new dictate from the Home Office has demanded Police meet new, increased, targets for apprehending speeding motorists, with individual Traffic officer's now required to be far less descretionary and lenient than before. Indeed, I'm sorry to say Psychnurse the chances are that if you have been stopped and reported for speeding at 85+ then you will be prosecuted.

If you were not stopped, then you may be ok as perhaps they didn't actually record you speeding. You will not know for about two weeks; if no letter has arrived by then you probably have escaped a fine / penalty points.