That afternoon he is to makeanaddress to the people of Northern Ireland, from the Odyssey centre, Belfast's new millennium arena, which opened its doors for the first time in December.
There, he is expected to makeanaddress that will reiterate his previous statements on the subject - pronouncements that, unfortunately, can only have been interpreted by his intended audience as acts of submission.
Mr Watson, who posts his daily thoughts on his own 'weblog', has been campaigning for Mr Blair to makean e-mail address available to the general public, and laid down Parliamentary questions on the subject last year.