"Now lets put everything we've learned together into a proper timeline of who knew what and when using the original, more detailed timeline. The individual bombings are in red while compiled information is in green.

• Sometime that morning, the Brits were conducting terror attack drills at/near bombing sites.
• ~8:43am, Mossad office in London alerted to a pending terror strike 6 minutes before first explosion.
• 8:49am, there was a report of an incident on the train line.
• Sometime between 8:43am 9:15am, Netanyahu was warned. It isn't clear when he was told, but someone tipped him off not to go out due to a possible terrorist attack. He (and the Israeli Embasssy) originally said that it was Scotland Yard who called in the warning, but the Brits deny this. However, the Mossad office got a warning (not telling where from, just saying "they").
• 9:15am, the media reported emergency services were called into action.
• 9:24am, Police still unsure what happened, say it may have been a train accident or electrical issue.
• 9:33am, reports of another incident.
• 9:40am, Police say there have been power surge incidents.
• 10:02am, Scotland Yard announces they are dealing with a 'major incident.'
• 10:14am, bus is reported to have exploded. This is the first real sign that it's a terrorist attack.
• 10:23am, Another bus is reported to have exploded.
• 10:25am, Tony Blair and company are still unsure about terrorist attack.

So if Mossad knew 6 minutes prior to the first bombing that means by 10:25am, while Tony Blair wasn't even sure, the Israelis had knowledge for about 40 minutes."

whatreallyhappened.com