1. Department of Chemistry; University of Cambridge; Lensfield Road Cambridge CB2 1EW UK
2. Department of Chemistry; University of Bath; Claverton Down Bath BA2 7AY UK
3. Fitzwilliam Museum; University of Cambridge; Trumpington Street Cambridge CB2 1RB UK
4. Hamilton Kerr Institute; University of Cambridge; Mill Lane, Whittlesford Cambridge CB22 4NE UK