What kind of wasp ?

What kind of wasp ?

Observation - What kind of wasp ? - UK and Ireland. Description: A smallish wasp about 17-18mm ,black with 3 brownish spots on its sides ,found in a disused gravel pit sheltering from rain .

A smallish wasp about 17-18mm ,black with 3 brownish spots on its sides ,found in a disused gravel pit sheltering from rain .