Chrysid cuckoo wasp, Chrysis ruddii possibly although highly unlikely as not previously recorded in London so more probably Chrysis ignita agg. - and you'd need a microscope to tell them apart, sleeping in a flower head in the North Marsh Pavilion pollinator garden, early evening last Sunday, 8th June 2025
#HackneyMarshes
More about ruby-tailed wasps…https://www.buglife.org.uk/bugs/bug-directory/ruby-tailed-wasp/
https://en.wikipedia.org/wiki/Chrysis_ignita