pbr A man fitting the description of Raoul Moat is tonight in a stand-off with police.br ppbr Officers surrounded the riverside area of Rothbury in Northumberland amid eyewitness accounts that Britain's most wanted man was holding a gun to his head.br ppbr As armed police swamped the area an ambulance arrived and made its way to the river side.br ppbr A security cordon of officers and vans stopped traffic entering the town from the east side while five police vans in convoy drove past with sirens blaring.br ppbr Two police vehicles were involved in a collision as they rushed to the riverside.