Outside of royal weddings, the biggest blowouts in London lately have been NFL games.The last five contests played in England have been no contest, decided by an average margin of 26.2 points.The Los Angeles Chargers (4-2) and the Tennessee Titans (3-3) look to stage a more competitive and more entertaining effort on Sunday at Wembley Stadium, where a London-record 84,922 fans saw Seattle whip Oakland 27-3 last weekend.The Chargers have won three straight and four of their last five, with their only losses to the teams with the best records in the NFC (6-0 L.A. Rams) and AFC (5-1 Kansas City).Los Angeles has the league’s fifth highest-scoring offense and is the only NFL team to score at least three offensive touchdowns in every game. Melvin Gordon is one of two players (Pittsburgh’s James Conner) with at least 450 rushing and 250 receiving yards, and Philip Rivers is third in the NFL with 15 touchdown passes.This is the Bolts’ second appearance at Wembley, having lost 37-32 to New Orleans there in 2008.After last week’s 38-14 win against the Browns, the Chargers remained in Cleveland to practice for a few days before flying out to London on Thursday. The players weren’t complaining about the travel.”We’re on a road trip, we get to go to London and we play in the NFL,” receiver Tyrell Williams said. “If you’ve got complaints with that, you’ve got something wrong with you.”The Titans have lost two in a row, but are in a three-way tie for the AFC South lead with Houston and Jacksonville.Tennessee counters the L.A. offense with the league’s No. 3 scoring defense at 17.8 points per game, with only Dallas (17.2) and Baltimore (12.8) allowing fewer.