In reply to:

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so maybe using an internal name outside is not such a good idea.

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I'm not particularly worried about that, firstly someone would have to gain physical access to a workstation, they would have to guess my password, my PIN and also have access to my conditional access fob. Oh yes, they'd also have to guess which domain I belong to as well. As for my email address shown in my profile, it's my home one. I wouldn't dream of putting my beeb one in!

Plus, I'm not re-registering myself now, I'm well on the way to a 1000 posts!