In this talk I present lensing results from the cross correlation of the VST ATLAS quasar catalogue with galaxy and galaxy cluster catalogues. We also detect strong Quasar - Planck CMB lensing. The quasar-galaxy cross-correlation allows us to fit models to our data to calculate the galaxy bias as a test of the ΛCDM model. We also fit halo models to our data in order to calculate galaxy cluster halo masses and predict velocity dispersions. The Quasar-CMB cross-correlations provide a direct measurement of the quasar bias and quasar host halo masses. We shall also consider the possibility of searching for dark matter haloes using quasar variability data from quasar catalogues from VST ATLAS, KiDS and ultimately the Vera Rubin LSST. We aim to present results from a pilot study using quasar variability data from a new CTIO DECam survey.