"Please apply, quoting blood-group, to the S.T.V. Head Office, London."
-- recruitment advertisement appearing in the Daily Prophet (DP2)
A society for the promotion of vampire welfare in the wizarding world
This society has a candle-lit office in London. They advertised for someone to run the office, with preference to be given to applicants with a garlic allergy (DP2)
While the date printed on DP2 is 8 February 1999, the timeframe for these events is 1992-1993.