Plot: Arg hopes a skinny-dipping trip to Walton-on-the-Naze with Joey, Diags and Mario will help take his mind off Lydia, who wastes no time rekindling a friendship with new guy Ricky while attending Sam's hot-tub party. Meanwhile, Lucy receives a Bruno Mars-agram at work, and Lauren, normally a super-confident ice-queen - breaks down at the prospect of donning a bikini for Sam's bash