Cleptoparasitic Wasp?

Cleptoparasitic Wasp?

Observation - Cleptoparasitic Wasp? - UK and Ireland. Description: Tiny wasp (~3mm) investigating holes in my garden bee hotel. There are Red Mason Bees nesting there together with activity from the parasitic fly Cacoxenus indagator. I wondered whether this could be a species of cleptoparasitic wasp?

Tiny wasp (~3mm) investigating holes in my garden "bee hotel". There are Red Mason Bees nesting there together with activity from the parasitic fly Cacoxenus indagator.

I wondered whether this could be a species of cleptoparasitic wasp?