I just needed to contact Companies House and before visiting this website for a geographic alternative visited their own Contact Us page.

I was therefore pleased to see that the number listed for the Companies House Contact Centre is now as follows:-

+44 (0)303 1234 500.

Well done Companies House for getting the message.  But hy ware the DVLA, HMRC, DWP etc continuing to use 084/7 numbers while other government agencies have now finally accepted the public and businesses are no longer willing to use them.