Days after one lithium prospecting company announced it needed extra investment or risks going bust, its competitor has revealed that Cornwall's new gold rush is going on as planned. Cornish Lithium, based in Penryn, one of two companies at the forefront of the lithium revolution, prospecting for the precious metal used in electric batteries, announced in its annual results this week that it needs £10m in further investment to be able to carry on. There have been no similar worries for competitor and fellow Cornwall-based company British Lithium as it announced a new prospecting agreement with China clay and minerals…