Citing in text
If no author or reporter's name is given (as in this case), then the author is the name of the organisation/company that has created the web page. In this case it is BBC News Dorset:
e.g. The surf reef in Boscombe is a thriving natural habitat, attracting over one hundred species (BBC News Dorset 2011).
When quoting directly from a web page you cannot put a page number:
e.g. BBC News Dorset (2011) reported that the Boscombe surf reef “was created to enhance waves using 55 giant sand-filled bags”.
Reference at end of work
Author's Surname, INITIALS., (or organisation name), Year. Title. Place of publication, Publisher (if ascertainable). Available from: URL [Accessed Date].
BBC News Dorset, 2011. Boscombe surf reef attracts ‘100 species'. BBC News. Available from: http://www.bbc.co.uk/news/uk-england-dorset-15410048 [Accessed 22 December 2011].