Information request - location of Brian Laurence's collection

A request from Peter Chandler:

"Brian Laurence (1928-2018) collected a wide range of Diptera families and published many papers and notes from 1944 until 2003. His early collecting was in Bedfordshire and he gave a local collection to the Bedford Museum in 1987. His career was at the London School of Hygiene and Tropical Medicine from 1956 to 1983 when he lived in London, and from then until 1994 at the University of East Anglia. After retirement he lived at Berwick-upon-Tweed and did fieldwork on Orkney and Shetland. He was interested in Empidoidea, particularly in predation, and in dung fauna (including Sphaeroceridae and Sepsidae) to which his PhD related. He did some taxonomic work on Sciaridae and his sciarid slides are now at Oxford University Museum. Checks with them and other museums have so far failed to locate the rest of his Diptera collection. If anyone has any knowledge of where it might now be located please let me know, as I am writing an obituary."