We’ve managed to make our first positive spider identification! This one is Philaeus chrysops, a species of Salticidae, or Jumping Spider. It is a male. We found him under the plum tree, near to some rocks. He was a bit camera-shy at first, but we persevered and finally managed to get some good shots of him.
How lovely! I like spiders & would be delighted to have this one in our garden (so long it is harmless).