Recently an initiative between the Predatory Bird Monitoring Scheme (PBMS) and the Natural History Museum (NHM) to share specimens launched with the first set of PBMS birds being sent to NHM at Tring. Through this collaboration, promoted through the WILDCOMS network, the PBMS will send specimens of more rarely submitted species, such as long-eared owls, so that the NHM can retain samples for their research and reference collections. The NHM then return soft tissue samples such as liver, to the PBMS allowing retrospective studies on the levels of pollutants in raptors.
Link to NHM Tring: https://www.nhm.ac.uk/visit/tring.html
Link to the WILDCOMS: https://www.wildcoms.org.uk/