someone on here was recently refused a spouse visa because the lady didn't declare on the visa app she had children, and when the ECO phoned the lady, she admitted she had children but thought the question was asking if she and her partner had children. so the ECO refused her visa (not sure if it was under 320(a), but her husband asked for reconsideration as they said it was a innocent mistake. the refusal was overturned by the ECO manager and her visa was granted . the thread is on here somewhere - try a search for 'False representations'