THIS will sound a bit cheeky, but I’m making an urgent appeal for help.

Below is an uncompleted sudoku puzzle. It’s one of a series in a programme I purchased for my iPhone and try as I might, I just cannot get any further with this one. And this is listed as one on the “medium” level of difficulty!

Remember, don’t just tell me what numbers go into which box – I need to know why as well.

Yeah, I know, I know… I’ll get back to the politics thing soon.