No interactions present.
The beautifully detailed photo shows the male (on the left) cupping his antennae around the female's head - my understanding is that the male does this to pass on pheremones to the female as part of their courtship/mating, and the yellowish basal segments of the male antennae are expanded for this purpose.
This sighting also brings us to 250,000 observations on iSpot altogether - congratulations!
Entomologist and biological recorder
Lat/Lng: 51.3148, -0.7236
OS grid ref: SU890580