The Cambridge Low Frequency Synthesis Telescope has been used to survey a region ≈ 7 × 7 deg2 about the North Ecliptic Cap at 151 MHz with a resolution of 70 × 77 arcsec2. The resulting radio source catalogue of 400 sources is complete to a peak flux density limit of 120 mJy beam–1. Using the Cambridge APM we have searched for identifications on the Palomar Sky Survey plate 550 which covers much of the survey area, and we list the 157 sources with one or more optical objects within 15 arcsec of the radio position.