An ex NappyValley lady - Nessie has the most amazing website and service for this sort of thing

http://thisisnessie.com/

I'd recommend Second office on Lavender Hill. They have a quick turn around and you can choose the paper depending on what you are looking to print.
http://www.secondoffice.co.uk/index.html

And if you need some cards/invitations designed before printing, Roopa who is the owner has great ideas.

We use www.moo.com and we're always very happy!

Interesting, I will give the recommendations a try for my own printing.

Brilliant, thanks guys!

There is a print shop at the bottom of garratt lane just near Tooting Broadway that is good value. I had something printed from Etsy there the other day. Called the Printing Shop or something similar.

I have done this, I have used snapfish (they lost my order however) so since then i have used photo box and a company called overnight prints.co.uk who were amazing. I had so many compliments over the invites!

Try printax on northcote road. They've printed stuff off memory sticks for us previously,

Am getting an invite designed via Etsy and need to then get it printed onto paper. Is there somewhere local that will do this or does anyone know of an online company I can email the file to and then receive the hard copies?

I think Gee Brothers on St Johns Hill will be too expensive for this... anywhere else?