I DO see your point alan, and my trigonometry isn't what it was...
But if you have a triangle, and extend either the horizontal or vertical side, then doesn't the angled side increase in length as well?
Therefore, by digging in, and therefore increasing the length of the diagonal, doesn't that leave more room for seats, even at the same spacing?
Point B - assuming, due to the 700-800 mm between seats, that digging down doesn't add any seats, lets assume the ground is exactly the same as in plans...
Guessing there are 60 rows all round (which there aren't, but for convenience sake) of 1000 seats per row, at a spacing of 800mm
Then a rough guess at the effect of decreasin the spacing between the seats to the minimum legal requirement of 700 mm would give 8 extra rows within the same space, or (in this scenario) an extra 8000 seats in exactly the same stadium....
Is this a possibility? Does anyone know if the planning is for the seat spacing to be 800mm?
What is the current spacing in the kop (because it IS a little tight, but I'm 6'5, and it's manageable enough for 2 hours at a match)