a voluntary aided church school where church attendance and a vicar's reference are required? If so, it might matter if the vicar did not send a reference, and you had not put any details on the application form so they could not get in touch with your vicar.
In that case, Perplexed, the school will have the 'vicar's reference' as a published criteria in its prospectus and prospective candidates will have been made very aware that failure to produce said reference will result in the applicant being considered last or not at all.
Interesting that Music grades might contribute to admissions criteria - I will have a look in more detail (and cross my fingers he passed his guitar exam!
Yes, you must look very carefully at the published criteria; in some schools, your child may be eligble for more than one category (academic test, Music, Drama, Sport) therefore increasing your child's chances of getting into the school of your choice.
Check for minimum standards for Music if they have such an admissions criteria.