Sorry Petherick, only just got to this one. I'm not sure I understand what your problem is - logins for Gramophone and What Hifi have been separate from each other since about March of last year, so you wouldn't have been able to log in over there using WHF credentials since then in any case. To log in over there, you need to use your username for that site (themusiciseverything, I checked) and whatever password you set up when registering.
Any help?