My research is primarily concerned with structure determination and its application to chemistry. Highlights include significant papers on the structures of so-called 'supramolecular' systems such as catenanes and rotaxanes which illustrate the importance of 'secondary' interactions in determining conformation and macroscopic properties. I have also maintained a significant interest in inorganic structure determination including coordination polymers and main group rings and cages. Although all of the work is of a collaborative nature the X-ray work reported throughout my publications has all been carried out by me personally.