This is a lovely church to visit, and they offer some great concerts. The Academy of St. Martin-in-the-fields orchestra is outstanding! If you visit the crypt in the basement, they offer brass rubbings - its fun to do, and could make a very nice souvenir with the right mat and frame. Fun for kids, too.
This charming old church on Trafalgar Square houses a well-regarded restaurant (which is a fund raiser for community outreach programs) and hosts an impressive music series. Check the schedule for its vast variety of concerts and recitals. We walked in during a free lunch time concert, when we needed a break from the crowds at the nearby British Museum.
Xmas classical concerts are always great.
St Marten-in-the-Fields is an Anglican Church on Trafalgar Square. It was constructed in the early eighteenth century.
Heard a concert here in 1999. Acoustics were fabulous. Dates from Roman period. Marvelous C18 interior designed by James Gibbs.