Tony Hart stars in Trivial Fact of the Day

All Saints, Margaret Street, is an extraordinary Victorian church in the London district of Fitzrovia. Somehow its architect, William Butterfield, fitted the church, its vicarage and a choir school on to its restricted urban site.

Laurence Olivier was famously a pupil at the choir school, and the other day I found another old boy of note. It's Tony Hart, the beloved children's television presenter and artist.