UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36

Example URL:
using visa card details to pay the The Ticket Factory <news@updates.theticketfactory.com>

Steps to reproduce the problem:
1. select ticket required on this site on NEC exhibitions
2. enter visa or mastercard details to pay
3. enter and get the response above

What is the expected behavior?
The transaction to pay the ticket charge to go through, and they would send the tickets to you by free post.

What went wrong?
add to summary above - or may have expired.
The report back comes up when the final push button request is made to make a payment transaction.
I have seen this type of report back before, but its very very rare.  The system clock is correct, checked three times, and all settings are correct.

Did this work before? No 

Chrome version: 54.0.2840.71  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 23.0 r0

As pointed out very rare but happens every time on the NEC exhibition ticket purchase with the 'ticket factory'.  For me this dead end is a real problem, as I can't buy tickets for any NEC event.