Just went to the local nature reserve, and there are 19 lapwing chicks around the place, not bad for a London site. The adults are busy fending off various predators, such as crows, jackdaws, herons, etc., and their aerial battles are amazing really. I watched one chase off a heron, which is about 10 times its size.
The hawthorn is well out now, lovely frothy white sprigs of it, but although the may may be out, don't cast a clout yet, as it is freezing!
Also, the cow parsley is now looking nice, although technically a weed. A bit later, watch out for wild carrot, often with its single red flower in the centre; formerly known as Queen Anne's Lace. Not a lot of people know that.