Don't think so Jack. Basically you've probably got at most an MY10 (same as mine was when stock), mine was registered End May 2010. MY10 models got the little more bhp you are talking about I believe. MY11 models (the ones with the turned down mouth for the grille and the DTR lights etc) are 523 bhp. You can tell which MY year you've got from the VIN code. I'd be surprised if your (registered in April 2010) wasn't an MY10.
Gone to the pork darkside