how do u get the rear outer suspension pin/bush off vauxhall vectra?

If you are referring to the rose bushes there is nothing technically difficult, but they tend to be siezed in position and you will need a rose bush removal tool to get it/them out.
There is a "how to" here-
http://www.vvoc.com/forum/showthread.php?t=74490

http://www.vvoc.com/forum/showthread.php?t=74491

You may have to sign up to see them, it's free to sign up as a basic member but the paid-for membership has benefits.
If you do tackle the job remember to spray the bushes with a good penetrating oil, such as PlusGas. Spray it a couple of times a day for a few days before you try to remove them.
Dont waste your time with WD40, it is NOT a good penetrant.

Veccy
May 2011