Does the British government have funds or financing independant of the British economy?

It having such resources is the only reason why I think that anyone should believe that that government can support that economy even for a little while.
http://www.telegraph.co.uk/finance/economics/6400738/Pound-rises-after-Chancellor-Alistair-Darling-says-Government-will-support-the-economy-until-recovery-is-established.html