What? What has based in Glasgow got to do with anything? (Their head office is in Pimlico BTW) were you thinking Scottish independence? Really, don't worry about it.
Premium Bonda are an NS&I product, with UK Government backing. NS&I offices are based in Blackpool, Glasgow and Durham, with call centres available to answer any questions.
Who advised you to 'move' your bonds ?? This doesn't make sense.