Found the power steering hose under the bonnet and visually checked for leaks (looked for wet patches), found nothing indicating the leak must be under the car.
There was a small amount of power steering fluid drips on the floor between the steering wheel and the drivers side wheel.
I refilled the empty power steering fluid reservoir and started the car. Within a minute it had all leaked out!
I put the drivers side wheel on a jack and removed the drivers side wheel.
Added a small amount of power steering fluid and started the car, I could see the power steering fluid spraying from the corroded part of the high pressure power steering hose pipe (see early part of my video).