Thanks for the response Rab.
Normally it's not much of an issue and we are happy to accommodate requests as far as possible.
I think nights like last night when every man and his dog spends the evening chucking his tea all over the ceiling whatever level he's at concentrate the mind when making level requests.
I did suspect it was more on an issue for those of us on triples than other types due to the higher levels we can achieve at entry so not entirely surprised by your response.
Out of interest while I have got you how many tracks are running 5 minute separation now and how much spacing do I need to climb through somebody elses level on the tracks? Is it the full 10minutes?