LONDON (Reuters) – British Foreign secretary Liz Truss will set out plans to create new low-regulation investment zones and more freeports on Monday, stepping up her campaign to be next prime minister. Truss and former finance minister Rishi Sunak are battling to replace Boris Johnson after a revolt against his scandal-ridden administration forced him to say he would stand down. Truss is ahead in polls among members of the Conservative Party who will appoint their new leader who will then become prime minister. She has said her main focus would be boosting growth at a time of rising inflation …