No interactions present.
Ladybirds do vary in colouration but the 'face' markings don't seem to have enough black spots for cream spot
Thanks for the comments. Could this be an immature specimen whose spots have yet to develop? Also, in the top left hand picture, I think I can just see the jaws between the antennae. (I am on the alert for evidence of Harlequins eating prey and hope to check past records for this some time. My present impression is that I have no examples. Bugs, particularly A. nemorum, no problem.)
Harlequin - doesn't look particularly freshly-emerged (it's quite dark), but more like a weakly-marked form succinea. Cream-streak has a very different pronotum and different, more streaked elytra.
First picture does indeed show the mouthparts, between the palps which are between the antennae. I've found records of Harlequins feeding on 54 different species from several different families in the wild, plus more from lab studies, and others that I've seen in the wild. Any more records are always useful!
Record your ladybird sightings!
Lat/Lng: 51.43372, -2.76236
OS grid ref: ST471707