I've probably got your back up accidentally here, 'cause the second part of my post wasn't aimed at you but at everyone posting in the threads bemoaning the lack of St Georges day celebrations, and there were plenty of them.
And as for the Wakefield prison stuff, the quote given in the link you pasted reads:
"Prison Service orders made clear that unauthorised badges and pins should not be worn.'' As one of her recommendations, she adds: "Staff should not wear unauthorised pins.''
which sounds to me like a ban on wearing pins and badges on uniforms.
No worries.
I skimmed through the report that Ben posted, and at 66 pages I may well have missed something.
The paragraph about the pins does suggest that pins are banned in general, but it also refers directly to the cross of St. George, and that "there was clear scope for misinterpretation.
If it was simply a "No jewellry" issue then fair enough, but why not just say just that.
I s'pose that the paragraph itself is open to misinterpretation. It is paragraph 2.92 should you be interested.