Is it actually signed or is it a pre-printed signature?

Good luck! It should hopefully get you a fast response...

I'm located in the US (though I sent the letters from London while on a trip there, to save postage)
And I recieved it at my home in the US.

Letter sent out on June 2nd or 3rd from London, recieved July 12th signed and personalized with my name!

I sent an envelope, with my letter, SAE and 3 set of international stamps

Address sent to was

Christopher Eccleston
Independent Talent Group Ltd.
Oxford House
76 Oxford Street
London W1D 1BS
UK