Former Speaker of the House Sir Kerry Burke has been convicted of drink-driving in the Christchurch District Court. Burke, 73, admitted driving with a breath-alcohol level of 517mcg of alcohol to a litre of breath. Police prosecutor Sergeant Glenn Pascoe said Burke was found driving his Volkswagen in Christchurch at 4.54pm on November 14.Alcohol levels above 250mcg draw an infringement notice, and levels above 400mcg mean prosecution at court. Defence counsel Andy Ogilvie said it was Burke's ...