Basically I left school with 7 GCSEs at C and above, including 2Bs in English and a C in science. However failed maths by only getting a D. Im considering retaking my maths in September and then upon passing with a C (hopefully) I will apply for Logistic Ammo Tech or EW operator. However I am also considering applying for combat engineer when I turn 17 in july. Which would be the best route to take, applying to become a sapper or retaking maths and fast track to LCpl in a different trade? And also what other jobs promote to LCpl upon passing phase 2 training? Thanks in advance.