Hundreds of thousands of workers may be in for a nasty surprise when they retire, due to an issue in the Government's own state pension calculator. The trouble lies with HMRC's online state pension forecast tool - introduced ten years ago to assist people with retirement planning - which displays projected pension amounts for users. It has now come to light that as many as 800,000 people may have been presented with overly optimistic figures, with some mistakenly believing they were set to