By Mia O’Hare Lord Sugar has made his first firing already, leaving one contestant sent packing. The Apprentice returned for its 18th series on Thursday night as Lord Sugar welcomed fresh contenders into the boardroom for the first time. In the first episode, the 18 contestants were split into teams of boys and girls as they battled it out to secure Lord Sugar’s £250,000 investment. They were sent to the Scottish Highlands and tasked with putting on high-end away days for corporate clients. The female team’s hope of impressing bigwigs from the hospitality industry crumbled when they gave fishc…