By Jessica Frank-Keyes ‘Revved up & raring to go!’ ‘More than a race.’ Inspirational slogans cover the walls at Silverstone race track, home to the British Grand Prix. And with just over three weeks to go ahead of polling day, the Prime Minister’s team will be hoping their choice of location for the Conservative manifesto launch injects some much-needed oomph into the remainder of the campaign. Rishi Sunak was accompanied by most of his cabinet, with former leadership rival Penny Mordaunt a notable absentee, and his wife, Akshata Murty, dressed in yellow. Taking to the stage, following introdu…