We present recent and ongoing results from extremely deep 18 day MERLIN + VLA 1.4GHz observations (rms: 3.3microJy/bm) of an 8.5-by-8.5 arcminute field centred upon the Hubble Deep Field North. This area of sky has been the subject of some of the deepest observations ever made over a wide range of frequencies, from X-rays to the radio. The results presented here use our deep, sub-arcsecond radio imaging of this field to characterise the radio structures of the several hundred GOODS Spitzer MIR sources in this field. These MIR sources primarily trace the luminous starburst sources. A significant proportion of the MIR sources are detected and resolved by our radio observations, allowing these observations to trace the IR/Radio correlation for galaxies over ~7 orders of magnitude, extending it to ever lower luminosities.
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