Thanks, now that you mention it I was aware of this. But it wasn’t immediately obvious to me what was being discussed in this context, to me it looked like it

Thanks, now that you mention it I was aware of this. But it wasn’t immediately obvious to me what was being discussed in this context, to me it looked like it was maybe a reference for to a certain set of postcodes or telephone number prefixes in reference to a certain set of people or some such. I think the plus threw me.