Prunus - miniature plum and giant cherry
This shrub (you can't call it a tree) is something I've been noticing recently. It looks like Prunus cerasifera 'Nigra' but is obviously smaller, the colours are even more vibrant, and it flowers later: this photo was taken today (April 12), a good month after other P. cerasifera varieties such as Pissard's Plum and Myrobalan Plum.
We see so many small-to-medium sized cherry trees that it's easy to forget that Wild Cherry (Prunus avium) is willing and able to grow into an impressively big tree. This one is about 30m. Like most big cherries it is in woodland and, as you can see, I didn't really manage to photograph it.