Seems odd if there is pressure at the rail. I had good pressure at the rail on my205 but in fact the breather on the tank was blocked and could not supply enough fuel.

Check the breathers and maybe pop the rail off and pump through some fuel in to a tank.

Check the fuel pump, filter and supply. I suspect something is bent, blocked or restricted.

Lucky at Goodwood, the infield is forgiving but the tyre walls are full of sand on the outside.