A prog on BBC Radio 4 mentioned a supercanner in the bowels of the NHM, inplied thst there were inages on line. Have not found those specific images (woodlouse gut flora, earwig gonads etc) but found this page with interesting stuff - just not nearly enough.
http://www.nhm.ac.uk/our-science/departments-and-staff/core-research-labs/imaging-and-analysis.html
Have a head louse for an e.g.
(https://imgur.com/9HVguVV.jpg)