Solar Power in the UK?!

I heard recently that some home owners in central London have and use the energy created by solar panels. Although, I prviously though having solar panels in England might not be the best way, due to the fact that it is more often the case that in England there is lack of sun. The man on the radio claimed that the only time he had a problem with catching enough energy was during the winter months, but that he stored most of his energy in the summer, taking cold baths since it was hot enough outside. It made sense to me because he was being sensible about when he used hot water or even his electiricity, he also made a point about not being at home during the day, which also saved energy and even more so during the summer. Heating your home and water, or for the use of energy there are plenty of companies that now specialize in installing systems for people.