Two men arrested when police raided a £1m cannabis farm have been jailed.

Officers found Mark Gjonaj, 28, and Kristian Zefi, 31, inside a commercial unit on Sussex Street, Sheffield, in March tending to more than 1,100 plants.

South Yorkshire Police said the grow posed a “serious fire hazard” to neighbouring buildings as its electricity supply had been hooked up to an underground mains cable.

Gjonaj, of no fixed abode, and Zefi, of Upminster Road, in Havering, London, were both jailed for 16 months each after they pleaded guilty to attempting to produce cannabis.