Hey so I haven't read 100% of the info given by OP so if my question is answered by OP then please just direct me to it, but anyway here's the question:
If we get allocated to one of the halls which we don't want to go to, are we allowed to ask for a switch? Just hypothetically, I mean regardless of which of the choices they give you (e.g. say they allocate you to your first choice, but then for example say you want to then switch to your second choice?)