CELEBS would have to prove "harm" to win libel cases in a shake up of defamation laws announced yesterday.

The overhaul would also crack down on "libel tourism" – stopping overseas claimaints using our courts.

Under the changes, anyone suing for libel would have to prove they had been caused "substantial harm". There would also be greater protection for people who expose issues of public interest.

Justice Secretary Kenneth Clarke said the Bill was a "step in the struggle to get the right balance between freedom of speech and protection of reputation".

The Government is also looking at banning the media from naming anyone arrested before they are charged.