No as said above, only the M62 system which is now live, which are the first to use 24 hr national speed limit monitoring.
All the others are set to whatever the variable limit is at the time unless it is off i.e 70 mph in which case there is no monitoring
If you are worried about breaking the 70 limit, get a series 3 2.25 and you never need to worry again
Of Course it has Sat Nav, Blue tooth and onboard DVD, now stick your Ear defenders back on
S3 Ex MIL 88 petrol owned since 1994