We present the first data release from the second epoch Molonglo Galactic Plane Survey ( MGPS-2 ) . MGPS-2 was carried out with the Molonglo Observatory Synthesis Telescope at a frequency of 843 MHz and with a restoring beam of 45 \arcsec \times 45 \arcsec \csc| \delta| , making it the highest resolution large scale radio survey of the southern Galactic plane . It covers the range |b| < 10 \degr and 245 \degr < l < 365 \degr and is the Galactic counterpart to the Sydney University Molonglo Sky Survey ( SUMSS ) which covers the whole southern sky with \delta \leq - 30 \degr ( |b| > 10 \degr ) . In this paper we present the MGPS-2 compact source catalogue . The catalogue has 48 850 sources above a limiting peak brightness of 10 mJy beam ^ { -1 } . Positions in the catalogue are accurate to 1 \arcsec - 2 \arcsec . A full catalogue including extended sources is in preparation . We have carried out an analysis of the compact source density across the Galactic plane and find that the source density is not statistically higher than the density expected from the extragalactic source density alone . We also present version 2.0 of the SUMSS image data and catalogue which are now available online . The data consists of 629 4.3 ^ { \circ } \times 4.3 ^ { \circ } mosaic images covering the 8100 deg ^ { 2 } of sky with \delta \leq - 30 ^ { \circ } and |b| > 10 ^ { \circ } . The catalogue contains 210 412 radio sources to a limiting peak brightness of 6 mJy beam ^ { -1 } at \delta \leq - 50 ^ { \circ } and 10 mJy beam ^ { -1 } at \delta > -50 ^ { \circ } . We describe the updates and improvements made to the SUMSS cataloguing process .