So, you know how sometimes people might think something happened a certain way but other people don't agree? That's kind of what's going on with the July 2005 London bombings.
Basically, on July 7th, 2005, there were four bombs that went off in different parts of London. Lots of people were hurt and some even died. It was a really sad and scary day for everyone in London.
But some people don't think it was just a normal bombing. They think that maybe there were other people involved who planned it all. They have some different ideas about what might have actually happened.
For example, some people think that the government was involved in planning the bombings. They think that maybe there were some secret reasons why the government wanted something like this to happen.
Other people think that the bombings were a false flag attack. That means that they think that maybe the bombings were planned out to look like they were done by one group of people, but really it was done by someone else to make people think that group of people did it.
There are lots of different theories, but basically it's just some people not believing that the bombings happened the way everyone else thinks they did.