"Elepump" also picked up the best six-sheet and best 48-sheet awards.
The agency also won best IT and consumer durables poster for Heal's, and best grocery, soft drinks or household poster for its "muffin" execution for Lurpak.
TBWA\London won the gold for its Michael Jackson's face campaign. Specific executions from the campaign won best use of giant poster (and special build), best use of Underground, metro or rail advertising and best media or entertainment poster.
Rainey Kelly Campbell Roalfe/Y&R's campaign for Land Rover UK won the readers' award, the best 96-sheet poster award and best automotive poster.
M&C Saatchi's "fat lady", Silk Cut's swansong marking the end of tobacco advertising in the UK, scooped the best alcoholic drinks or tobacco poster. And the agency's AA ad "3 mile jam" picked up best use of bus advertising.
Abbott Mead Vickers BBDO won best use of taxis for Yellow Pages and Lowe won best fashion, beauty, healthcare or toiletries poster for Tesco Cherokee "cliff".
John O'Keeffe, the executive creative director at Bartle Bogle Hegarty and the chairman of the judges, said: "This year's very eminent jury had its passions aroused - egos were bruised, work ripped up, fist-fights broke out. But in the end, I think the right decisions were reached ... in most cases." He added: "There is some lovely work to admire, but I don't think any of us thought it a vintage year."