Rather than having someone type all the info into the advert there is likely to be a commercial database of place names in the background that the MoD has bought into to "save money."
On top of that, as another "cost saving measure" I'll bet that the MoD don't even run their own vacancies website, but subcontract it to the lowest bidder who have no consideration of or even care about British Sovereignty if it can save them a few quid on the contract.