yeah, i suppose the white coats you've already got might be ok..u could bring them along anyway and ask. But i got the impression they wanted us to buy the white coats from them and most people did (but you're right, it is probably a money making thing

) The white coats from imperial are quite long, well...actually, maybe that was just on me, cos i'm tiny
you don't need a white coat for going on the wards in first year, u just need to dress smartly. In second year, or third year, u have to buy another, different (shorter) white coat for going on wards.