A tree with an identity crisis

Another sunny day without aeroplane noise, and today the sun had real warmth. Time for the annual pilgrimage to Columbia Road, and £15-worth of instant gardening to rescue my reputation from the sorry accumulation of brown bits in my window-boxes - quite a few of which are showing signs of new growth despite my ungrateful neglect over the winter.

Among the crowd-pleasing entertainments today was this unusual hybrid.....