WORK on the world's largest Audi headquarters complex is finally due to get under way more than two years after InteriorExterior won the original contract.
The firm landed the deal from the German car maker in January 2004 and expected to start work that summer.
But Audi decided to alter its plans - adding an extra two basement levels - which more than doubled the original £14 million cost.
The new 17,667 sq m UK headquarters will feature showrooms, servicing areas, offices, conference space and exhibition facilities.
The facility will overlook the elevated section of the M4 in west London and replaces a derelict building formerly used as the head office for pharmaceuticals giant GlaxoSmithKline.
The site was made famous by GSK's best known brand, a giant illuminated Lucozade bottle that greeted commuters from the side of the building.
The original sign, dating back to the 1950s, has been donated to the nearby Gunnersbury Park Museum.