Royal Mail are set to make a change to how the post is delivered in Liverpool, by introducing new electric vehicles.
The postal service will use the new "micro" vehicles to help reduce emissions in the city.
The vehicles, roughly the size of a golf buggy or a quad bike, will be used in residential areas as a potential lower carbon alternative to larger Royal Mail vans.
They have been specially designed to help postal staff deliver letters and smaller parcels on their daily rounds.
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The six-month trial will see a selection of vehicles operating in Liverpool, Edinburgh, Crewe, Swindon and London.
Simon Thompson, chief executive officer at Royal Mail, said: "It's really exciting to see these micro electric vehicles making their way into our daily deliveries.
"We're committed to keep on reducing our environmental impact and we intend to leave no stone unturned in trialling new technologies and new ways of delivering to help us do that.
"As our fantastic posties make most deliveries on foot, this already means we have the lowest reported CO2e per parcel of major UK delivery companies.
"From drones to electric vehicles, fuel-efficient tyres to bio-CNG trucks, we'll keep on innovating to reduce our environmental impact even further."
The vehicles, which can accommodate more than an average daily round's worth of letters and small parcels, are charged using a standard three-pin plug.
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