The common bond test for credit unions doesn't have to be just about where you live; it can be about who you work for, or something else you have in common.
What's interesting about the OP's post is thast judging by the rates quoted this ispart of the DWP's drive to grow the credit union market by providing funds for credit unions to lend out at higher rates than CUs would normally charge. These loans are often easier to get than the traditional CU loan where you may have to have been a member for a qualifying period...