We present a homogeneous sample of 1361 L and T dwarfs brighter than J= 17.5 (of which 998 are new), from an effective area of 3070 deg super(2), classified by the photo-type method to an accuracy of one spectral sub-type using izYJHKW 1W 2 photometry from SDSS+UKIDSS+WISE. Other than a small bias in the early L types, the sample is shown to be effectively complete to the magnitude limit, for all spectral types L0 to T8. The nature of the bias is an incompleteness estimated at 3% because peculiar blue L dwarfs of type L4 and earlier are classified late M. There is a corresponding overcompleteness because peculiar red (likely young) late M dwarfs are classified early L. Contamination of the sample is confirmed to be small: so far spectroscopy has been obtained for 19 sources in the catalogue and all are confirmed to be ultracool dwarfs. We provide coordinates and izYJHKW 1W 2 photometry of all sources. We identify an apparent discontinuity, Deltam~ 0.4mag, in the Y- K colour between spectral types L7 and L8. We present near-infrared spectra of nine sources identified by photo-type as peculiar, including a new low-gravity source ULAS J005505.68+013436.0, with spectroscopic classification L2gamma. We provide revised izYJHKW 1W 2 template colours for late M dwarfs, types M7 to M9.