What's this bug on Dahlias and Chillies ?

I noticed my Dahlias (in pots outside) being nibbled a few days ago.

I found some brown specks that look like a tiny mite under the leaves. They came off when sprayed with a powerful jet of water and the dahlias appear to be recovering.

However they have found their way into the greenhouse and a few are getting on to the Chillies. I struggle to get a clear photo, this is the best I can do, any ideas what it is and how to get rid. I can't blast them off with water as Chillies are too delicate (the water made a mess of my dahlias). Underside of chilli:



Zoomed in:

 

Could well be thanks @NigelJ there is a sticky residue on a few leaves. I sprayed one chilli with neem oil yesterday as a test, to see if it kills them without damage. I forgot to add soap to the spray so I'll give that a try on its own today.

 

I'm not sure what those white things are, under a magnifying glass they look like eggs, could they be whitefly eggs? I haven't noticed any flying whitefly.

 

Wasps to the rescue!