We present the extended source catalogue for the UKIRT Widefield Infrared Survey for H _ { 2 } ( UWISH2 ) .
The survey is unbiased along the inner Galactic Plane from l \approx 357 \degr to l \approx 65 \degr and |b| \leq 1 ^ { \circ } .5 and covers 209 square degrees .
A further 42.0 and 35.5 square degrees of high dust column density regions have been targeted in Cygnus and Auriga .
We have identified 33200 individual extended H _ { 2 } features .
They have been classified to be associated with about 700 groups of jets and outflows , 284 individual ( candidate ) Planetary Nebulae , 30 Supernova Remnants and about 1300 Photo-Dissociation Regions .
We find a clear decline of star formation activity ( traced by H _ { 2 } emission from jets and photo-dissociation regions ) with increasing distance from the Galactic Centre .
About 60 % of the detected candidate Planetary Nebulae have no known counterpart and 25 % of all Supernova Remnants have detectable H _ { 2 } emission associated with them .