The new solar-powered postboxes, which feature a digitally-activated drop-down drawer for parcels, will be installed in cities including Edinburgh, Manchester, Nottingham, Sheffield and Sunderland It's a postbox . . . of the future (Image: PA Media)

Royal Mail is unleashing 3,500 solar-powered "postboxes of the future" nationwide, boasting a digitally-triggered drop-down compartment that lets punters dispatch parcels up to shoebox size. ‌

This revolutionary design – marking the most dramatic transformation to the postbox in its 175-year existence – underwent testing in Hertfordshire and Cambridgeshire earlier this year, and is now being rolled out to major cities such as Edinburgh, Manchester, Nottingham, Sheffield and Sunderland. ‌

Punters simply scan a barcode via the Roya

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