All ginger thorax, black abdomen with white tip
No interactions present.
On an apple tree?
No it is a Cotoneaster growing against a fence.
I found one back in October. This one is very early up for the spring.
I've only just posted the photo which was taken last May.
It has happened to me before. I should have checked both dates.
At least you have got the web link that was given in a comment about my observation.
Lat/Lng: 53.613213, -2.447618
OS grid ref: SD704130