Ordering food on your phone while in the queue for McDonald's can result in a maximum fine of £1,000 and 6 points on your licence.
That's because - even though you're on private land and at a halt - you could be breaching rules on using a handset while driving.
And with hungry Brits queueing in their thousands at newly reopened McDonald's drive-thrus across the UK, many have been encouraged to place orders using the chain's phone app to speed things up.
But doing so could prove an expensive mistake. "If your engine is running, your phone should be nowhere near your hands. This is still the case if the engine stops automatically to save fuel (called 'start-stop technology)," The RAC explains in its guide to mobile phone laws .
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