As mentioned on Reddit (<a href="http://www.reddit.com/r/worldnews/comments/bo623/i_wrote_to_my_mp_2_weeks_ago_regarding_the_de/c0nq3a8" rel="nofollow">http://www.reddit.com/r/worldnews/comments/bo623/i_wrote_to_...</a>), this may likely be a screw-up by a secretary, as the letter does make sense aside from this problem.
Funny for sure. Probably a late edit where a non-technical editor or a script replaces any acronyms with "Expanded Acronym (EA)". When I was a journalist that used to be done for style reasons as a matter of course, even if the acronym was widely understood.
So, I think the title should make it clear that this is Britain's Minister for Digital Britain. To my American eyes this read as if some random clergyman was confused.