Found nothing in the Wall Street Journal 18th February, but this on BBC 17th February -

"Iran calls for UK Iraq pull-out

Tony Blair said UK troops were in Iraq with the Iraqi government's backing
Iran's foreign minister has called for the "immediate withdrawal" of UK troops from Basra, in southern Iraq.
Manouchehr Mottaki claimed the presense of the British was "destabilising" security in the city."

The Iranian Government in Tehran are worried about growing unrest in their Shia Arab south western province of Khuzestan.