The speedo style symbol does sound like cruise control, there should be buttons on the dash to control them... On. off, +, -, and resume normally.
The lolipop sounds like miles until (or from) refuel
I've realised I must have nudged the + and - on the steering wheel and it looks like I turned on a speed limiter.
Have pressed the minus till it just says three dashes and mph on the dashboard so I assume that will mean I'll be ok (?) for tomorrow - and yes it looks like the 'lollipop' is something to do with the fuel which I'll ignore until the man of the house comes back on Wednesday to tell me what a twit I am!
Many thanks for your help.