Shehzad Tanweer killed seven people on a train at Aldgate

But they also pledged commemorations planned for Friday would not be overshadowed by the tape of the Aldgate suicide bomber.

"It's like a smack in the face - the timing especially," said Nader Mozakka, 50, from Finchley, north London.

Mr Mozakka, whose wife Behnaz died in the King's Cross Tube bombing, said the tape and its timing were "abhorrent".

"They have released it at the time when a lot of survivors are going through hell."

He also said it proved their suspicion that the bombers knew "exactly" what they were doing and had "planned for a long time".

The timing of today is in very bad taste Loyita Worley Bomber video released

"This is typical of the enemy that we have. They have no respect - they kill innocent people," he said.

Grahame Russell, whose son Philip, 28, died in the Tavistock Square bus bombing, said the video would not detract from Friday's commemoration.

"We will not even think about it," he said. "It will be consigned to the place it should be consigned to, which is the dustbin."

Jacqui Putnam, 55, a survivor of the Edgware bomb, said: "Nothing's going to overshadow this anniversary.

"Tomorrow we're just going to mourn the dead and show they're not going to intimidate us."

Loyita Worley, who was in the next carriage when Tanweer's bomb was detonated, said she was "not surprised" the tape had emerged.

"The timing of today is in very bad taste," she said.