To start I should explain that I am an Australian citizen who will be arriving in the UK with a working holiday-makers visa next week. I've put in an overseas application with the Army and am looking serve either as an OP Assistant, Tank Crewman or Line Infantryman. I've been through the medical process for entry into the Australian Defence Force where the doctors noted a problem that they though would knock me out of the running for certain jobs, but shouldn't keep me out of the Military entirely, namely a eustachian dysfunction. Basically I have trouble making my ears pop on command, the ENT specialist I saw said specifically that I have "significant negative middle ear pressures" on both ears when he gave me a pressure test, and that I have some minor scarring on my ear drums. That being said I'm fine with flying and have been able to take part in SCUBA diving on about two-dozen occasions without noticeable trouble, save for one dive in which I admittedly descended too fast (so its really my fault). The doc said he thought I'd probably be out of anything with rapid chanegs in pressure like parachuting, but otherwise he could see no reason why I couldn't handle flying, mountaineering etc. I've been assessed on about 5 occasions as having perfect hearing within the last 2 years, and I have no other injuries or health problems of any kind. I've never had any issues with balance, even after flying or diving. So I was wondering if anyone with medical expertise would be able to give me some advise as to whether or not this could be a problem with my application. I am of course aware that I'm out of the running for the Paras, SAS etc, and I'd be perfectly happy serving with any regiment that the Army recommended. Any help with this issue would be greatly appreciated.