Possible Clues:

• Forced walk with arms pinned behind the back
• Forcibly propel what could well be a long hop?
• Manhandle head of gang in from entrance, perhaps
• Carry forward by force
• Make one go 4 across, perhaps, for a month
• Propel forward with the arms pinned behind the back
• Force forward and back, beginning to go over motorway bridge
• Force (person) to move forward
• Mist around river one month constrained forward movement
• Force forwards as French go back to border