the limit is 60 not 56 and an infringement is not an offence.
Yes, if it’s a motorway or dual carriageway. But the OP doesn’t say that. So IF it’s a single carriageway it’s most certainly an offence.
Pete 
the limit is 60 not 56 and an infringement is not an offence.
Yes, if it’s a motorway or dual carriageway. But the OP doesn’t say that. So IF it’s a single carriageway it’s most certainly an offence.
Pete