Purves is an English actor, most famous for his roles in Blue Peter and Doctor Who. 
The following quote is from an interview with Digger:
" Religion makes me angry but I don't get overheated about it but I really dislike it and am a confirmed atheist and I believe most of the world's troubles are caused by people who have some abounding faith in some stupid superstition. It also makes me sad and depresses me immensely that people can be so stupid. Defending this, that and the other based on total myths and nonsense."