We did an install in Hounslow earlier this month and here are a few pictures. This system has just 6 panels on a house roof with concrete tiles, but they are each high power (357W) so overall the system will generate a good supply for the property.
The install included optimizers (fitted behind each panel) to reduce the effects of shading. Also anti-pest plastic fingers have been fitted around all the panels to prevent pigeons and other birds from being tempted to nest under them – these can be seen in the photo’s.