An experiment in Post-Proposal Peer Review (PPrPR) The grant proposal which follows was submitted to the UK’s Engineering and Physical Sciences Research Council (EPSRC) on January 06 2015. We are making the proposal publicly available, as an experiment in online peer review of a grant proposal (rather than a research paper), via The Winnower and PubPeer as both sites have a fundamental commitment to open debate and discussion of academic research and ideas. The PI (PM) will blog about the progress (and ultimate fate) of the proposal at the Institute of Physics’ physicsfocus blog. Details of the format of EPSRC proposals are available here. The proposal is structured according to these guidelines (although we have forgone the requirements re. font size/type so as to produce a document in line with The Winnower’s ‘style file’). We have not provided detailed information on costings but an edited version of the “Justification of Resources” section of the proposal is included. The sections below are taken from what is known as the Joint-Electronic Submission (Je-S) form associated with the grant, the detailed Case for Support, followed by the Pathways to Impact statement, and the Justification of Resources section.