If so, or even if not, when is the best time to prune as my two bushes
are getting on the large side?

http://www.congokid.demon.co.uk/photos/bush03.jpg
http://www.congokid.demon.co.uk/photos/flower03.jpg
http://www.congokid.demon.co.uk/photos/flower01.jpg

Thanks

--
congokid
Good restaurants in London? Number one on Google
http://congokid.com