Charlock!

As it was a bit quiet on the bird front this morning I had a look at the steep embankment in Montpelier Park to see if there were any interesting plants in flower. There wasn't an awful lot other than Green Alkanet, Cleavers and White Deadnettle but a large relative of the cabbage was just coming into flower - I was sure it was Charlock - very common in Montpelier and I normally see it on the railway embankment near the tunnel. The other names for this plant include Field Mustard and Wild Mustard so it is perfectly edible, young leaves can be eaten in a salad and older leaves cooked like cabbage. An expert on Facebook thinks it might be Black Mustard, though. This is the plant which is grown for the familiar culinary mustard seeds and to be sure about the correct ID I would need to check the seeds in a few weeks time.