It may also be possible to save some time by pre-ordering. Pizza Express generally manage a quick turnaround anyway, but I think it would *definitely* be worth investigating whether or not this is possible.
> Can I also suggest everyone brings cash to make paying go quicker or we might not make it back in time :)
Yes; it could also be worth checking what service charge they are going to place on a group this size, and agreeing up front if you're splitting the bill or trying to pay for what you specifically order.
Well done getting this organised! I wish I could also come, but someone's got to look after the venue... :)
- James