Always helps to have a 4 foot scaffold pole in stock for when the breaker bar aint enough.
Looking on the bay and i see that torque multiplyer`s are getting cheap. Could be an alternative to the above !
http://www.ebay.co.uk/itm/Torque-Amplifier-Multiplier-Car-Garage-Wheel-Wrench-Tool-Kit-13Pc-Set-Hand-Winch-/331012423742?pt=UK_Hand_Tools_Equipment&hash=item4d11e0c03e