Nope, in libel cases the burden of proof is opposite to what it normally is:
Another interesting element of English defamation law is that the usual burden of proof is reversed. In most other kinds of legal action the defendant is presumed innocent and the prosecution have to prove their guilt. In defamation cases, however, the defendant is presumed guilty and their claims to be false, unless they can prove them to be true. There is also a difference in the burden of proof between regular citizens and public officials. A public official must prove that there was malice or intent behind the libel or slander to gain compensation, while a regular citizen musty only prove negligence.