Thanks for your replies although it just illustrates perfectly my state of mind : on the one hand, why not? and on the other hand, it seems just completely unlikely! Although, Pamplemousse, Sheffield University offers about 60 studentships (for either Masters or PhD), so I guess I'm 64th and then maybe it doesn't sound so absurd to hope that 4 of the first 60s will drop out. Satchi did you eventually got one of those scholarship?
Thanks to you both!