When Lynsey Swinscoe noticed her 13-year-old son Jake had a stuffy nose in June last year, there could be only one explanation. ‘I figured it must be hay fever,’ says Lynsey, 41, from Wiltshire. When Lynsey Swinscoe noticed her 13-year-old son Jake had a stuffy nose in June last year, there could be only one explanation. ‘I figured it must be hay fever,’ says Lynsey, 41, from Wiltshire.