LONDON - Neil Blackley, chairman of the media advisory board for private equity firm Apax Partners, is giving the keynote speech at the Annual Luncheon of the Advertising Association in London on May 15.
   Apax Partners has the largest and longest established media team in the British private equity business and was involved with the attempted take-over earlier this year of the UK's biggest commercial broadcaster, ITV.
   The event attracts more than 200 senior executives from across the advertising industry.