I arrived late morning in driving rain and terrible light. All 4 birds (2 males and 2 females) were in a small conifer tree, on the edge of a housing estate, feeding well but proving hard to get good views of. After 30 minutes or so the rain stopped and the birds appeared happier to move out to the open branches, eventually providing great views.
I have only ever seen one Parrot Crossbill previously, so to see 4 together was a bit of a treat.