Presentation given by Dr Nicola Knight on behalf of the PSDI in the Connecting RDM I session of the 1st Conference on Research Data Infrastructure Abstract: In this presentation we discuss the activities undertaken in the UK through the Physical Sciences Data Infrastructure (PSDI) initiative, part of the wider Digital Research Infrastructure (DRI) Programme. We will present the aims of the PSDI initiative, our initial scoping work and trials, and suggest how this project can and should interact with other related initiatives on a national and global scale. Physical Scientists are crying out for a socio-technical data infrastructure that connects existing experimental and computational facilities. We believe that a cross-discipline and cross-technique digital infrastructure that builds on and bridges across existing initiatives, while these continue to serve their particular fields, is crucial to, and the best way to achieve global collaborations in the 21st century.