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We report the discovery and spectroscopic confirmation of 22 newgravitationally lensed quasars found using $\textit{Gaia}$ data release 2. Theselection was made using several techniques: multiple $\textit{Gaia}$detections around objects in quasar candidate catalogues, modelling of unWISEcoadd pixels using $\textit{Gaia}$ astrometry, and $\textit{Gaia}$ detectionsoffset from photometric and spectroscopic galaxies. Spectra of 33 candidateswere obtained with the William Herschel Telescope, 22 of which are lensedquasars, 2 highly probably lensed quasars, 5 nearly identical quasar pairs, 1inconclusive system, and 3 contaminants. Of the 3 confirmed quadruply imagedsystems, J2145+6345 is a 2.1 arcsecond separation quad with 4 bright images($G$=16.86, 17.26, 18.34, 18.56), making it ideal for time delay monitoring.Analysing this new sample alongside known lenses in the Pan-STARRS footprint,and comparing to expected numbers of lenses, we show that, as expected, we arebiased towards systems with bright lensing galaxies and low source redshifts.We discuss possible techniques to remove this bias from future searches. A|b|>20 complete sample of lensed quasars detected by $\textit{Gaia}$ and withimage separations above 1 arcsecond will provide a valuable statistical sampleof around 350 systems. Currently only 96 known lenses satisfy these criteria,yet promisingly, our unWISE modelling technique is able to recover all of thesewith simple WISE-$\textit{Gaia}$ colour cuts that remove $\sim$80 per cent ofpreviously followed-up contaminants. Finally, we provide an online database ofknown lenses, quasar pairs, and contaminant systems.

Gravitationally lensed quasars in Gaia: III. 22 new lensed quasars from Gaia Data Release 2