Tyre Pressure Monitor False Alarm?

[Infrustria]

Return trip to Bristol over the weekend and the car performed flawlessly until we got close to home when the Tyre Pressure warning came on; checking the Sensus display it told me that all 4 tyres had lost pressure.

So, being close to a service station I pulled in and checked. Not one needed filling. Set off, recalibrated and the warning disappeared with no recurrence.

Anyone had a similar experience?

Incidentally, managed a 52mpg average over the trip. Probably more down to the relatively empty motorways and endless 50mph stretches whilst 'smart motorway' upgrades are undertaken than good fuel management on my part. Now, if only I could get my commute above 42.