Just a quick point for those who think that all we need to do to keep VFR appart from each other and from IFR is pass traffic info.
Unfortunately in these modern new fangled times with TCAS (especially since überlingen) this is no longer the case.
I have personally had to fill in several reports in situations where both aircraft had been passed traffic on each other - were visual (glorious CAVOK weather) and still the IFR aircraft "TCAS Descends" causing problems to all.
We can no longer get away with reduced separation (visually) or passing traffic both ways. We are being pushed down the route where we have to separate VFR from IFR aircraft regardless.
Very sad
