Documents for use in Brunei may be certified by the UK Foreign and Commonwealth Office, but this is not normally necessary.
The fee is £71 per document and documents will be processed the same day if lodged by 2.00p.m.
The Brunei Darussalam High Commission is located at:
19A Belgrave Mews West
Tel. 020 7581 0521
Fax 020 7235 9717