Jer, re: the delay 0600-0700 you are correct.
LL34,
We do talk to BAA/HAL (they are the same enitity). However, as you've pointed out, money is a big factor. Everything that we suggest that would expedite traffic flow, i.e. more high speed turn offs, whatever, everything has to have a business case attached to it, and we have to show HAL that they would get their money back in x years time.
HAL airside ops staffing levels are way below requirement.
Mixed mode will not work because we haven't got enough space on the ground. As has been pointed out, we struggle presently. Another big reason is lack of stands to park all the planes on.