Those with white only ON the scutellum (the little notch between the wings) are “G. rufus” (notographus).
Gonipterus notographus (formerly this was misidentifed on our site as Gonipterus lepidotus)
Mid September 2020
Clifton Beach
Identification and information thanks to Boris Büche
Photos KE
. 
Early October 2019
Bridport
Photos KE
. 