rattle

Hey guys, I’ve got an annoying exhaust rattle at exactly 2.5k. It seems to be coming from under the middle to front of the car and is louder under load. Here’s a video of the sound I’ve had a look under the car and given the exhaust a few knocks but nothing seems to be obviously wrong with it...

sounds like i have a noise like a gentle rattle coming from the steering wheel boss? any ideas of what this could be? any help would be appreciated. thanks chris