There is no ban of deaf people at races there is and always has been a ban on headphones under UKA rules as stated previously. It's even on the fine print if you enter a race through this site. If the organser's DK's some folks good, it needs to happen more often.
There is NOT currently (nor has there been) a UKA rule banning head/earphones. I had this response from UKA when I queried it last year:
"More misleading information I’m afraid. The rule has been proposed on a number of occasions in the past but has always been rejected – mainly on the grounds of the difficulty of enforcement and the different circumstances that can apply across the range of courses that are encountered."
Race Directors can choose to ban them, and I do wish those that do would actually enforce it. There's no point otherwise.
What a ridiculous response, how would it be difficult to enforce? I suggest a 2 step approach could be used