Analyse differences between the UK and other countries in the manufacturing industries
Effectively this goes down to competitiveness - how competitive (prices) your goods are compared to other nations. Lower prices may be reached through lower costs of production which may include lowering labour costs (lowering minimum wage), increasing productivity (investing capital goods) and a lower exchange rate (lower exchange rates make your product cheaper in other countries)
It's a subject really open to interpretation, if you focus mainly on productivity, talk about current issues in the UK with productivity (lowest in western eu etc.) and explain how it can be fixed (incentives to invest by tax breaks / allowances on profit withholding) or building infrastructure etc. it should be just about enough
(I read your other thread, this mainly answers your last question and the theory behind it