Wasp - help needed with ID please

Wasp - help needed with ID please

Observation - Wasp - help needed with ID please. Description: Seen on knapweed in my mini-meadow in the garden. I wondered if this could be a Cerceris sp. but I'm pretty hopeless with wasp ID!

Seen on knapweed in my mini-meadow in the garden. I wondered if this could be a Cerceris sp. but I'm pretty hopeless with wasp ID!