To bring this to the fore, I'll post a comment.

I heard Peter's address at Sacra Liturgia USA last summer in New York City. the Sacra Liturgia movement is all about the Latin Mass, OF and EF, being a tool for evangelizing. I think registration for Sacra Liturgia UK is till open.

http://www.sacraliturgiauk.org/registration/

There is affordable lodging available through university B&B.
http://www.universityrooms.com/en/city/london/home?gclid=Cj0KEQjwj7q6BRDcxfG4pNTQ2NoBEiQAzUpuW5-NUP_R8WjNo-Bc5HaWp46GiFTtWYZzNyQeCBKj3_4aApxf8P8HAQ