It really is dry here, the ground is like concrete and most of the grass looks dead.
This will give you an idea of what that expanse of ground looks like up close. It has been even drier but there was a little rain over the last few days. The pictures were taken beside Willesden Sports Centre car park with Capital City Academy in the background. The playing fields still have lush grass, so perhaps it is just a local drainage issue of some sort.