Cowfold Seagull
Fan of the 17 bus
Currently the capacity isn't 31,000. I'm suggesting that it should be a bit over that in the future.
I find it strange that 30,400 is just right, but 31,400 is well over the top and should never even be considered.
I think the North could look better, one just has to look at the construction pictures to see that there is enough room for at least 10 rows without uprooting the concrete trusts (I think that's what they're called) that hold the two arches up.
You obviously didn't visit Withdean, it would have been far too small, positively tinpot in fact.