This very small wasp flew inside the house on the window. It is a Bethylidae species and based on the long hairs on the eyes [3, link] this could be the very rare Bethylus boops [1,2] (see also here). Pending validation I’ve put her on Bethylus sp..
Expert Jeroen de Rond has confirmed this specimen as B. boops. A very nice new garden species!
He indicated the haired eyes are not unique to this species and other aspects like wing venation are equally important.
The species is associated with Ivy where it finds it’s hosts. The garden contains numerous of this plant so i’ll pay more attention to it so hopefully more observations can be made, especially since there is little known on the parasitic relationships of the species.
There is no cut-out visible on the last sternite  which makes this a female.
There are two mites stuck to the underside of the abdomen.
Talking about plastic pollution, she has a bunch of plastic threads stuck tightly to her left hind leg. I tried to remove it without success.
References1 Nederlands Soortenregister
3 Peeters, T.M.J., C. van Achterberg, W.R.B. Heitmans, W.F. Klein, V. Lefeber, A.J. van Loon, A.A. Mabelis, H. Nieuwen-huijsen, M. Reemer, J. de Rond, J. Smit, H.H.W. Velthuis, 2004. De wespen en mieren van Nederland (Hymenoptera: Aculeata). – Nederlandse Fauna 6. Nationaal Natuurhistorisch Museum Naturalis, Leiden, knnv Uitgeverij, Utrecht & European Invertebrate Survey – Nederland, Leiden.