can anyone help?? My power steering pump lower mounting bolt has snapped this afternoon. suddenly lost the power steering, and when I looked under the bonnet it had thrown the belt off.

The lower rear bolt appears to have gone, allowing the pump to twist round. I need to know if i can drive to work and back tomorrow without knackering the system? (the steering is just heavy at low speeds)
Am planning to buy a new bolt tomorrow, and get under the car to change it tomorrow after work, but i don't want to drive the car to work (about 20 miles round trip) if it will kill the steering rack...!
Any advice much appreciated, and hopefully one of these days I will be able to help someone else instead of asking other people!!!
