By August Graham, PA Business Reporter & Lawrence Matheson British Gas’ parent company, Centrica, saw a boost last year from clawing back money it lost during the energy crisis. However, their pre-tax adjusted profit took a dip, falling to £2.8 billion in comparison to £3.2 billion the previous year. On another note, the retail unit of the business, composed primarily of British Gas and also incorporating Irish supplier Bord Gais, watched its adjusted operating profit shoot up from £94 million to a hefty £799 million. This rise came about through cost recovery, as revealed by Centrica. The pro…