The Traditional Latin mass!
Amazing church - I believe is the last church in the City of London to hold their services in pretty much 100% Ecclesiastical Latin (which is the way the church pronounces Latin if is different in regards to Classical Latin which is the way most schools back in the 1800 hundreds when it was basically a school subject right from your youngest years in grammar school right on up through the older grades and right into your Colleges and universities studies!
I love my church.