The only way is by by IP address - and you, my dear piece of

In fact, another weel kent member on this forum has posted more often from this IP address than you have - and the sheer frequency compared with other IP addresses the two of you have posted from means I have my suspicions.
I may suspect that you are a ringer for a certain other forumite - but it remains a suspicion . . . . and although I could perhaps pursue this matter with more diligence I do not see any reason to.
Do you?
- NickB
