Front passenger side rear control arm is completely smashed out of the joint, you can see the bushing. I've attached some photos to demonstrate.

Firstly, can the car be driven? I'm aware it can't be driven particularly safely but could it be transported say a few miles, or is there a real chance of the wheel buckling? Perhaps a stupid question...

Secondly, how hard, considering it's already smashed out would it be to replace? Would I need any specialist tools or just spanners/sockets and could I simply whip off the wheel, get a second hand part off eBay and drop it in? Does a replacement need pressing?