As others have already said, this an area of Birmingham with a high Muslim population.
I have no idea who has set this up, and haven't read the article, but I suspected that this was the reason when I read about it this morning.
Is this a private company or another crazy Birmingham City Council idea?
This story will enter the realm of the urban myth along with that nursery rhyme, Winterval and suggesting that council employees don't eat at their desks during Ramadan that anyone outside of Birmingham disputes ever happened... Well it was only a matter of time before someone brought them up, it may as well have been me! 
Birmingham must be the home of stupid-ideas-in-the-name-of-racial-harmony-that-quickly-get-dropped-before-they-reach-the-rest-of-the-country-because-they-are-fucking-ridiculous.