It's part of who you are.
The thing that differentiates El Reg from the rest of the bunch is that instead of being modelled on "The New York Times" or "Wired" (the old-skool mag), you seem to be modelled on a classic London tabloid; it's the tone you use. That's what keeps me coming back. I know I will get the news, but I'll get it delivered in a similar way to how a mate would tell me in a pub, with a nod and a wink.
Additionally, your audience is predominantly a tech-savvy one. We know the difference between .co.uk and .com. In general, we're not marketing dweebs (no offence to any Reg Marketing Dweebs reading this...) er.... my point is, we know what a .co.uk means, and we remember that. It helps your image as being distinct from the ZDNets of the world.
So all that being said, put me down as a .co.uk supporter. It's part of who you are. Like a pom who refuses to relinquish their accent after spending decades overseas, it becomes a charming aspect of your personality. You're doing great, just keep going.