Having just went through the application process for:
PwC (Got an offer) KPMG (Got an offer) Grant Thorton (Got to telephone interview stage) Ernst & Young (Only passed online tests)
Got a large amount of information from this website regarding these application processes and I would be happy to answer any questions.
Some specifics, all Belfast applications.
PwC was for Tax, although auditing is the same process KPMG Audit Grant Thorton Tax E&Y Tax
Ask me questions!