How do you book the Open Day? Watch
And with the campus tours, you don't get to look round your department, so me travelling there and not seeing the Business School would be pretty pointless...
So do you just want to do straight Maths, or something a bit different Cal?
I booked and attended an open day earlier in the year, they never asked for tickets or a booking id or anything so you should be fine =] you should really try and visit. I loved it although it is quite an isolated campus 'bubble' so others may hate it. It is beautiful though