Metcalfe is understood to be a Yorkshire farmer. Anecdotal evidence suggests that he does not think much of the Roman Catholic Church. See http://www.evangelical-times.org/Articles/July02/jul02a07.htm for some serious suggestions of anti-Catholicism. According to the Charity Commission, Metcalfe is a trustee of Evangelical Times and its accounts for 2005 show him to be a shareholder and a director. It is believed that Metcalfe helped establish the paper in 1969.
He is also involved in the secretive Truth in Science organisation.
[Update: Metcalfe has died since this was written.]