St Martins in the Field

This is the beautiful interior of the St Martin's in the Field church which sits at the corner of Trafalgar Square. We paused for a while to listen to the pianist playing.
The church has a very interesting and unusual window (see extra). There is more information regarding this on the article below.

https://mymodernmet.com/shirazeh-houshiary-east-window-st-martin-in-the-fields-london/