Sent him a LOR, three photos and a SASE on February 22nd and received my pictures today on July 16th - one of them signed.
Here's the address I used:
Les Misérables
Working Title Films
26 Aybrook Street
London W1U 4AN
United Kingdom
I reckon that the address is still valid but I don't think he's in the UK anymore since he put an American stamp on my envelope..
Oh, and if the person who forwarded my letter to him is reading this: THANK YOU!
Picture:

Envelope (front):

Envelope (back):
