Observations of the lunar occultations of I I radio sources have been made at Jodrell Bank, using an interferometer to surmount some technical difficulties. This paper provides accurate positions and brightness distributions for these sources. Some of the observations have been made at several frequencies, allowing a study of the variations of spectral index within the sources. In particular, 3C 2, 3C 245 and 3C 279 are quasars which bear a striking resemblance to 3C 273. For 3C 2, the data suggest an identification of the radio jet with an optical one.