By Rhodri Morgan Britain’s largest bank by market capitalisation is trying to rally an effort to push a final investment decision over the line for the delayed Sizewell C nuclear super project. According to a Bloomberg report today, HSBC is discussing the possibility with investment funds to provide a debt facility that would be guaranteed by the UK’s export finance agency. The report said that people familiar with the matter said the move would help the project, Sizewell C, which in January received government approval to begin the process of building the site, due to take nine years to compl…