These were laid this month in a spruce in Pellon. They almost always lay just 2 eggs, as do most of the dove and pigeon family. They are always white, a characteristic of eggs laid in dark places, but many of the family build flat platforms of twigs in exposed places. Exceptions in our area - Feral Pigeons and Stock Dove.
I have a Collared Dove nest from Hanson Lane, West Central Halifax, built entirely of electrical wire, various colours, collected in the BT yard opposite. The nest came down with some winter hawthorn tree prunings.