P423 Teletext 423 May20 23:19:27       ——  ——————————————————————————  FRIDAY 16.30 BBC2 INTERNATIONAL SHOWJUMPING David Vine introduces coverage of the British Grand Prix from Hickstead. Leading riders, including Michael and John Whitaker, compete for one of the summer's top prizes, and try to secure a national team place for August's World Championships at The Hague. ——————————————————————————————————————— TV index 410 Documentaries 422 SALES AND MARKETING JOBS ... p643 TV arts TV docs Go green Finance