Let us not forget that the mission of the Ministry is not to make fun of D.V.D.'s cockney accent, but rather, the constant and clichéd carping about its accuracy. In fact, on his birthday, let's celebrate the life of a guy who can laugh at his mistakes.
Van Dyke's attempt at a cockney accent (lapsing out of it at times) was nonetheless widely ridiculed and is still frequently parodied. It is still often cited as one of the worst attempts at a British accent by an American actor, a fact acknowledged with good humour by Van Dyke himself on the 2004 DVD release of the film.
Also, you have to love a guy who keeps doing new things at his age:
One of Van Dyke's modern passions is producing 3D computer graphics. He created many of the 3D rendered effects shown in Diagnosis: Murder, and continues to work with LightWave 3D... As an A cappella enthusiast, Van Dyke has sung in a group called "The Vantastix" since September, 2000.