Thanks everyone. We have had PHI for ages but were unable to claim for his last grommets and adenoidectomy so I wasn't sure how it worked. He has resorted to miming when he is trying to communicate because his speech has deteriorated so I have got him an appointment to get a hearing test and will get him in to see the ENT straight after. I'm not sure if it is just the wax or if the grommets are displaced but at least once we have the hearing test we will know what level of loss we are dealing with.