Top Marks for St Michael Cornhill
Squeezed hard between two modern buildings is St Michael Cornhill, with history dating back to 1055. Burnt down in the fire of 1666 this building dates from about 1722, although some of its magnificent bells date from 1421. They often have lunchtime concerts, which are a great way to refresh your afternoon - do try one if you get a chance. And putting this post together, I found their rector's independent mindedblog, which makes good reading.
(For the non-British readers, "St Michael"