Folks
I left 18 months ago, will no hassles.
Re keeping your bank account open, that will work until the bank asks you for a copy of your new residents visa, as I have just been asked for; needless to say I cannot produce one, and I guess my account will just lapse.
Regarding repatriation tickets when you resign, they are for your family and yourself, similar as to when you joined, unless any kids have appeared since!
Good Luck ...........