The Huffington Post has announced full details of tomorrow’s UK launch event, which will consist of a panel discussion moderated by Richard Bacon.

Speakers on the night include Alastair Campbell, Kelly Osbourne, Celia Walden, Kelvin MacKenzie, Shami Chakrabarti and Arianna Huffington.

The panel will debate the media’s impact on the Self-Expression Revolution.

Today Huffington Post UK told journalism.co.uk it has more than 300 bloggers signed up for the site, with more expected to sign up after launch.

UK editor-in-chief Carla Buzasi said today: “It’s a really interesting mix of people. Alastair Campbell is blogging for us on day one, and hopefully the others on the panel will be following suit shortly afterwards.”

The event is taking place at the Curzon Millbank, with the panel debate beginning at 7pm. An open invitation has been sent to the site’s bloggers-to-be to attend the launch.

Currently the url huffingtonpost.co.uk is password protected, but will be unveiled and made public this week.