Re: Good, good.
UK has offered no guarantees whatsoever so any EU citizen staying in the UK feels like living on borrowed time.
Also, you can attract scientists however you want but a considerable portion of UK's scientific research was financed through the EU. Guess what's going to happen to that money now. Why should the scientists go to the UK which first has to find the money to finance the projects when they can simply go anywhere else in the EU where the research will move now?