London fans are in the grip of “Twilight” fever ahead of the UK premiere of “The Twilight Saga: Breaking Dawn - Part 1.” But so-called Twihards hoping for a glimpse of Kristen Stewart, who plays the love-besotted teen Bella Swan, will be disappointed. Instead they will get to see Robert Pattinson, the British actor who stars as her vampire heartthrob Edward Cullen, Taylor Lautner, who as werewolf Jacob Black is her best friend and director Bill Condon before the screening at the Westfield shopping center in Stratford City. The first “Twilight” movie was released in 2008. This fourth film finally sees Bella marry her vampire boyfriend. The film opens in the UK on Friday.