Today I heard a strange rattling or knocking noise from my front offside corner of my car as I was driving home. It hadn't been a long drive and wasn't very fast.

Steering didn't feel any different and when I stopped and looked there was a ring of spray around the inside of the wheel arch, although I couldn't see any liquid leaking anywhere around the centre of the wheel, just seemingly sprayed outwards in a ring around the wheel arch.

When I opened the bonnet I could see the power steering fluid appeared to be boiling or bubbling in the reservoir, is this normal?? Also the engine seemed hotter than normal, especially towards the side that was affected.

Any help or advice would be great!