A load of Galls

We recently found these small galls on Ground Ivy leaves at Sevenoaks Wildfowl Reserve.

They are Rondaniola bursaria or Lighthouse Galls.   You can see the fresh calls on the first photograph and then the holes in the leaves once the midge has emerged.   The fly is Dasineura glechomae for those interested. 

Galls intact

Holes where midges have emerged