This post from another board (steddieddie msg 4425 at UK.ADVFN) would seem to clear up the little mystery concerning the origin of Tasmania Oil and Gas Limited:
For the record, TB did not set up Tas O&G in 2005. It was set up as TXO by Texas Oil & Gas so as to "hold" the availability of the name at Companies House. The parent and the newco then swapped names. It's a regular practise where a Co intends to change its name but needs certainty of availability of the new name while process takes place.
In this case, the newco, then bearing the parent's former name became a dormant co of the newly-named TXO which, of course, TB arrived last year with a mission to re-invent. This dormant co on TXO's books was subsequently renamed to Tas Oil & Gas as a vehicle involved in the revival of Empire.