Steve wrote:
:: Hey, didn't meen to spark an argument!!
::
:: But thanks lads. I'll go for Roundup and leave it a good while to
:: dissipate.
::
:: Steve.

TBH, I only use it on dandelions and occasionally thistles, everything else
I have is easy to get out by hand.
Roundup is useful for, dandelions, thistles and docks, all of which have
deep roots, any part which is left in will produce another plant.
if you have these weeds, I wouldn't bother with it:

Nettles: easy to get out and their roots are bright yellow...Alan gave some
excellent pointers on how to make the tops into a 'nettle manure'...details
he http://www.nugget.demon.co.uk/MetaFAQ/nettle.html

Brambles: Fairly easy to cut back and dig out the roots manually.

Grasses: as above, or turn the sods upside down now to let them rot down
over winter.

other 'flimsy' weeds like chickweed etc can just be turned in.