Given the fact that the Amex is not aligned to the cardinal points, and given the likely wind direction, I'd think the wind on Saturday evening will be coming in over the 'NE' corner of the ground.
For those going to the Amex, I would suggest more than a 'light summer jacket' will be required Bozza as it's looking pretty cold.
We'll be a strong N/NW wind with temperatures well down on what we've become used to, and also below average (2-4C) plus there's a chance of some sleet / hail /...