Do you have a strong opinion about what the summit can achieve? Will you be in central London during the protests? We want to hear from you.
You can record yourself making your comment about the G20 with a mobile phone, video camera or webcam - and send the result to us.
Follow the video on the right to get some tips on recording video.
The videos you make could be used as part of the BBC News Online and television news coverage.
You can also send us videos or photos you capture of scenes in London.
How important is the summit? Is this the best way to resolve the worldwide economic crisis? What do you think of the protests? Will you be taking part in the protests?
You can send your video messages in the following ways:
Send direct to the BBC website
upload your video here
email it to
or text from your phone on
+44 7725 100 100
if you are outside the UK.
If you want to get involved in a conversation on seesmic, you can do that too. Seesmic is a video conversation site where you can join our BBC Have Your Say discussions, or start a conversation of your own. Simply record your video directly onto the site, or record it in the usual way and upload it
Qik is a video upload service that works from your mobile phone. If your phone is supported, you can down load some software that will connect you so that you can stream your video live onto the web. Come and find the Have Your Say video and upload your replies
Make sure that you check the price of your data package before you start.
When taking photos or filming please do not endanger yourself or others, take unnecessary risks or infringe any laws.
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