Hey that's really simple.
Weld pipe to spanner and insert longer rod.
I'm off to the shed to find materials then weld it all together.
thank you for your input Brian V
Peter
This is Brian's spanner below 
Brian: just copy the image code on the right hand side when in Photobucket and paste directly into your post , just like I have done above. (I cropped it to save file space)
Easy if you only need one picture..
BTW what length did yo make the handle for correct torque?