The videotaped testimony from London suicide bomber Mohammed Sidique Khan was accompanied by a second video containing a message in Arabic from Al-Qaeda number two Ayman al-Zawahri.
Ayman al-Zawahri's message was aired by al-Jazeera TV.
Here are some key extracts from the tape, translated into English:
We have warned over and over again and we repeat the warning that we shall respond to anyone who participates in the aggression against Iraq, Afghanistan and Palestine in kind.
And that as they made rivers of blood flow in our countries, so shall we, with the help of Allah, make volcanoes of anger erupt in their countries.
The lands and interests of the countries which took part in the aggression against Palestine, Iraq and Afghanistan, are targets for us all.
So let all those who want safety distance themselves from them. And the one who warns has been excused.
Blair not only disregards the millions of people in Iraq and Afghanistan but he does not care about you as he sends you to the inferno in Iraq and exposes you to death in your land because of his crusader war against Islam.
I talk to you today about the blessed London battle which came as a slap to the face of the tyrannical crusader British arrogance.
It's a sip from the glass that the Muslims have been drinking from.
This blessed battle has transferred - like its glorious predecessors in New York, Washington and Madrid - the battle to the enemies' land, after many centuries of the battle being on our land and after troops have occupied our land in Chechnya, Afghanistan, Iraq and Palestine.