Yup depends on how
A spokesman for Human Fertilisation and Embryology Authority (HFEA) said: "The law says that men donating sperm through licensed fertility clinics are not the legal father of any child born through that donation. "Men giving out their sperm in any other way - such as via internet arrangements - are legally the father of any children born with all the responsibilities that carries."
http://news.bbc.co.uk/2/hi/uk_news/e...on/7125895.stm