Thank you very much both. If there's anyone on the forum who is currently working in a Big4, would very much like to chat with you.
I work for the big 4, and a PR, in short an expat asian, i believe the salary mentioned is on the high side, i believe a manager will start at $6k to 8k, and SM, should be around 7k to 9k.
I am not so sure how your secondment will work out, you should need to check if housing is provided, and where this will be. If housing is provided, expect to receive the lower salary levels, coz i dont believe a firm is willing to pay you the same rate as the local hires. if you are getting an additional accomodation.
working hours wise, its bad, but as mentioned by my manager who came from london, the working load is the same, its just the working habit that differs between sg and london. remember, global audits normally have global recovery rates, as such, i believe the alloted hours needs to be well spent.