JTP - when I read this story I went onto Asda's website and there is an area where you can fill in an online application form.
Speaking from an employer's perspective, if I did send out an application form and someone sent it in incomplete, that person wouldn't get an interview (unless they enclosed a letter giving their reasons).
All decisions with regards giving someone a job are based on past prejudices - from the name ( I knew a person called X once and they were ok), through to schooling (oh they went to Y school, they must be clever).