What is interesting is that out in the suburbs, where the density of the bomb-fall was lower, some of the red dots are in a line and are therefore very likely to be part of the same stick. And sometimes there is a space in the line, perhaps indicating one that didn't explode?
I think if I lived in a house on such a space I would be inviting my friends in the Royal Engineers for tea and stickies, in return for deploying some of their sensitive instruments so that a few readings could be obtained while we all had a cuppa...