Burma Campaign UK has announced two petitions calling for action.

TAKE ACTION
The Burma Campaign UK and MTV have joined forces again to call for action by
the United Nations Security Council. Visit http://www.mtvburmaaction.com to email the UN Secretary General Ban Ki-moon and the permanent members of
the United Nations Security Council.

TAKE ACTION
Email European Union governments calling on them to agree targeted economic
sanctions that will ensure European companies no longer help pay for the
guns and the bullets used against peaceful protesters in Burma. Visit:
http://www.burmacampaign.org.uk/eu_sanctions.html

Also, photos are now online of the 10,000+ strong march that took place in London on Saturday. You can see the set here or the slideshow here.