In the foreground, a lamp post, height approx. 5 metres. In the distance, the Shard, height 309 metres. In between, the tower of the Henry Wood Hall
TQ3279 : The Henry Wood Hall (former Holy Trinity Church), the height of which I estimate by triangulation to be about 34m (the distance from the viewpoint to the hall being about 100m, and to the Shard 900m).