It is a caqtch 22 situation for sure. If you can fill out the form then you are literate enough to not require disability under the mental test. If you arrive in person you have not only proved that you are mobile but that you can see and hear enough not to get hurt. End of another disability claim. Should you have someone else fill in your forms or represent you, then you must be financially well of and not need any support or have enough relations to support you. If you can get your doctor to assess that you are on deaths door step then they will look into it with a commitee that will take at least twelve months to decide the outcome. Does this sound about right.
That's the way the mop flops.
My thanks to Brian for this site.