I'm looking for a UK company that I read about in a magazine (BA
in-flight magazine possibly) a couple of years ago that was set up to
undertake any work requiring bulk corrections and fixes to any sort of
item that has manufacturing or design defects. They do things like
removing logos from products because a spelling mistake was made in
the screenprinting and it wasn't spotted during production. Because
the products they work on aren't usually worth very much they aim to
do the work at a very low price. I suspect they use low-skilled,
temporary labour to keep the costs down. I have several thousand
plastic moulds that need a small piece cut out, to get a machine shop
to do this would be prohibitively expensive so a low-cost operation
where the work can be done by hand would be the answer. If this
particular company can't be found then similar companies who do the
same work would be okay; would need to be UK based though.

If it's the one I remember reading about, it's Instant Muscle. There
is contact info at
http://www.charitiesdirect.com/charity3/ch001953.htm
and at
http://beehive.thisisleicestershire.co.uk/default.asp?WCI=SiteHome&ID=8053&PageID=43179
(This site has more info)

Another possibility might be prison workshops. 
http://www.hmpenterprises.co.uk/
Contact information for working with plastics production is at
http://www.hmpenterprises.co.uk/plastics.htm

Owain

Hi Owain

Thanks for your information. It's not exactly the company I was
looking for, the one I was thinking about specialises in recovering
defective goods; although the links you've provided are possibilities
and I'll look into them. The difficulty I have is that the plastic
mouldings are from high precision injection moulds (as apposed to
vacuum form tooling) and need to be carefully worked if they are to be
recovered.