Hello fellow Roverers. My first post on here but any advice would be much, much appreciated. I’m a total novice but willing to learn from my mistakes. I’m recommissioning a P6b that’s been laid up for yonks. And unsurprising the rear brakes are locked absolutely solid (even though the handbrake was left off). The car is simply immoveable. The car is stuck in the garage in a really awkward position making it very hard to get under it in any safe way. Is there any simple way I can release the rear brakes so that I can at least push the car to a better position?