A commission for the Thanksgiving Service on June 17th 2009 as part of the 700th Anniversary celebrations at St. Botolph's church (also known as 'The Stump') in Boston, Lincolnshire.
You can download a free copy of the sheet music here: http://www.alexeckford.com/music/sheet_music/locus_iste.pdf
The 50-piece choir (the combined St. Botolph's Church Choir and St. Botolph's singers) was conducted by Eric Wayman, and the organist was David Shepherd.
Princess Anne was in the congregation, and it's her footsteps you can hear at the end of the recording as she walks to the lectern to read the first lesson.