"H" Reg 1991.

Started doing my Micra's rear brake shoes only to find that the hub nuts
will not move, I am going to need a scaffold pole or similar to crack
them.  I think that the hub nuts have never been off of the car and are
now partially "welded" on.  Is this a common occurence?

Also, are either of the threads on the hub nuts a left hand thread?

Finally, is there anything I should know about the rear bearings or is it
simply a case of tightening them to the correct torque as mentioned in the
Haynes BOL?

Can it be done just taking the drums off?  Is there enough room.  The 
nearside drum fell off by itself but the offside is jammed on tight.

I am going to try again tomorrow.

TIA.