I wasn't referring to exchange tickets, but "normal" ticket sales, and season ticket sales.
For example, in a standard row of 26 seats presently someone could buy seats 1 and 2 as season tickets, then someone else could buy seats 4 and 5 as season tickets, leaving seat number 3 empty and unlikely to be sold. Under the system I'm proposing that would not be possible and the second purchaser would have to buy seats 3 and 4, or seats 5 and 6, thereby always leaving two seats.
Our current system where we can have as many as 150/200 single seats, out of 10,000 is very inefficient.
I'd have thought our ticketing gurus would have been able to avoid this with their decades of experience!!!