Gall of Urophora cardui?

Gall of Urophora cardui?

Observation - Gall of Urophora cardui?. Description: This gall was on a thistle plant and was was just over an inch across. Seen at RSPB Sandwell Valley.

This gall was on a thistle plant and was was just over an inch across. Seen at RSPB Sandwell Valley.