A reorganisation at the SW5 project means, amongst other things, that I'm no longer employed there.
Yeah, it came as a bit of a surprise to me too.
So as a newly ex-SW5 person, 'xw5' is the new me.
Should the remaining and/or new staff come along here, the username change means it can be clear who's who and means I can retain the reputation for knowing what I'm talking about... usually