  So far the lens J1131-1231 has been studied only at optical and X-ray
wavelengths. A detection in the radio was almost missed as a result of an
incorrect position and archive problems. A direct analysis of NVSS uv data - in
contrast to the catalogue or images alone - provided sufficient evidence of a
detection to justify further radio investigations. The system was subsequently
observed with MERLIN and the EVN in e-VLBI mode. Even though MERLIN seems to
show the lensed star-forming regions and the compact cores, a preliminary
analysis of the EVN data only shows an AGN in the lens itself but not the
lensed cores. Additional VLA observations will be carried out soon.
