Ronald Hutton reckons that the cult of Bride was fairly weak in Britain "being developed mostly in cities which possessed Irish visitors or immigrants, or stations for pilgrims crossing the island".
The Brutus legend, mentioned by Ishmael, may have been a complete fabrication by Geoffrey of Monmouth. In his introduction to Monmouths "The History of The Kings of Britain" Lewis Thorpe says that Brutus the grandson of Aeneas never existed.
Seeing as though we're messing about with Bree and Bri, I'd like to throw Brigantia into the mix.
cheers
fitz