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Published online by Cambridge University Press: 12 April 2016
We have selected a field from the VLA FIRST Survey which is typical in all aspects except one: it contains a bright, but extremely compact VLBI calibrator - J1159+291. 127 unresolved FIRST sources with SFIRST ≥ 10 mJy lie within 2.5° of this calibrator. λ6 cm MERLIN observations with a resolution ~ 60 mas detect around half the sources. These detections form the basis of a sample of faint but compact radio sources which are ideally suited to follow-up VLBI observations.