The William Tennent Madrigals made their first concert appearance on Aug. 4 during the group's trek through Ireland and the United Kingdom for the London Olympics.

The posted video shows the choir kicking off the performance at St. Patrick's Cathedral with "Non Nobis Domine." Anybody interested in following the Madrigals' progress on the trip should check this site out, which has photo slideshows and an updated blog.

The group also performed Sunday night at the Royal College of Music in London and at noon today at Canterbury Cathedral. Their final performance is Wednesday at Southwark Cathedral at 3:45 p.m.