In association with the giant 10 kton DUNE (Deep Underground Neutrino Experiment) being built at Homestake there will need to be a smaller near detector at Fermilab. The Sheffield group is collaborating with Bern University to build and test a liquid argon version of this with responsibility to design, build and test a 1.0m x 0.5m time projection chamber device. The project involves contributing to the design, installation and operation of this with Bern colleagues and subsequent analysis of particle data following transfer to a test beam at CERN. There will be opportunity also to conduct support detector R&D using the Sheffield liquid argon test-stand facility to study upgrade options for the readout, including comparison of silicon photo-sensors, cryogenic photomultipliers, GEMs and micromegas devices. Critical measurements are anticipated of liquid argon parameters including electron drift. There will be chance of long term attachment (6-12 months) in Bern or at CERN in Switzerland.