This is what was posted on The Inbetweeners Facebook page earlier:
We told you you’d be the first to hear about Inbetweeners stuff, and althought that’s still true The Sun went rifling and found some stuff out about a sequel. Nothing’s signed yet, and Australia is just one of the ideas we’re kicking around, but we hope to have a new and definitiely final film for you some time next year.
We hope you miss us as much as we miss you.
We hope to have more news soon.
PS. Personally hoping that Australia won’t be used as, as a die hard fan of the original episodes, I really feel we should be seeing them moving on in University and seeing some unexpected twists where Jay ends up going to the same one as Simon or plots such as this.