It's nearly 10 years since suicide bombers took to London's transport network and killed 52 people.
There's never been a permanent memorial at Tavistock Square to remember those who lost their lives on the number 30 bus.
Now fundraising is underway to build a “People’s Memorial”.
Funded entirely by donations, it’s hoped it will serve as a fitting tribute the 13 people killed, and those who helped on the day of the attack.
Philip Nelson is behind this campaign and explained more.