Um although I dont know where the Adonis LB are in London,Jason,I can give you a few pointers as to finding them.Pick a nice sunny day, crouch and stare at bare waste ground or gravelly areas ,even lightly used gravel car parks! sometimes.Look directly at the ground.You may also get a
Scymnus frontalis micro LB or an 11-spot this way.
Also think of the bare terrain around gravel extraction sites .Good luck.Jason