sign in Glossary B Glossary Acronyms   A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z B Basic Set (Basic Data) Licence Data which the Secretary of State is entitled to publish in accordance with the provisions of the Model Clauses. Block A North Sea acreage sub-division measuring approximately 10 x 20 kms, forming part of a quadrant. e.g. Block 9/13 is the 13th block in Quadrant 9. Borehole The hole as drilled by the drill bit. Business Day A normal work day. This definition excludes Saturdays, Sundays, Good Friday, Christmas Day or a bank holiday in England and Wales pursuant to the provisions of the Banking and Financial Dealings Act 1971.