  The combination of two-dimensional kinematics and gravitational lens
modelling permits detailed reconstruction of the phase-space structure of
early-type galaxies and sets constraints on the dark-matter distribution in
their inner regions. We describe a project which combines integral-field
spectroscopy from an ESO Large Programme using VIMOS on the VLT with deep HST
ACS and NICMOS images to study a sample of 17 early-type lens galaxies at
redshifts between 0.1 and 0.3, drawn from the Sloan Lens ACS survey (SLACS).
