It was a complete element of surprise for them, so they vented online and asked for advice.
They claimed that they had been driving for around 30 years and had never heard a thing about it.
Looks like what folks mentioned online seems to be true.
If you witness a hearse leading a funeral procession whilst on the road, be considerate and respectful.
Drivers who encounter a funeral procession should only overtake it on a dual carriageway.
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