Where a person—
steals or attempts to steal any mail bag or postal packet in the course of transmission as such between places in different jurisdictions in the British postal area, or any of the contents of such a mail bag or postal packet; or
in stealing or with intent to steal any such mail bag or postal packet or any of its contents, commits any robbery, attempted robbery or assault with intent to rob;
then, notwithstanding that he does so outside England and Wales, he shall be guilty of committing or attempting to commit the offence against this Act as if he had done so in England or Wales, and he shall accordingly be liable to be prosecuted, tried and punished in England and Wales without proof that the offence was committed there.
In subsection (1) above the reference to different jurisdictions in the British postal area is to be construed as referring to the several jurisdictions of England and Wales, of Scotland, of Northern Ireland, of the Isle of Man and of the Channel Islands.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .