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We report the detection of discrete, lensed radio emission from the multiplyimaged, z=2.516 submillimetre selected galaxy, SMM J16359+6612. All threeimages are detected in deep WSRT 1.4 GHz and VLA 8.2 GHz observations, and theradio positions are coincident with previous sub-mm SCUBA observations of thissystem. This is the widest separation lens system to be detected in the radioso far, and the first time that multiply imaged lensed radio emission has beendetected from a star forming galaxy -- all previous multiply-lensed radiosystems being associated with radio-loud AGN. Taking into account the totalmagnification of ~45, the WSRT 1.4 GHz observations suggest a star formationrate of 500 Solar mass/yr. The source has a steep radio spectrum (alpha -0.7)and an intrinsic flux density of just 3 microJy at 8.2 GHz. Three other SCUBAsources in the field are also detected by the WSRT, including SMMJ16359+66118,a singly imaged (and magnified) arclet at z=1.034. Higher resolution radioobservations of SMMJ16359+6612 (and other highly magnified star forminggalaxies) provide a unique opportunity to study the general properties andradio morphology of intrinsically faint, distant and obscured star forminggalaxies. They can also help to constrain the technical specification of nextgeneration radio telescopes, such as the Square Kilometre Array.Comment: 5 pages, 2 figures, to appear in A&A letter

Gravitationally lensed radio emission associated with SMM J16359+6612, a multiply imaged submillimeter galaxy behind A 2218