Originally Posted by Pierre Argh
in unregulated airspace a visual approach should IMHO count as a VFR procedure...
I'll disagree with that. In unregulated airspace there is no requirement to separate IFR from VFR anyway. There is, however, a requirement to separate IFR from IFR if they have put themselves under the control of an Approach Control Unit (which they will have done).
So - taking the above into account - You have a gin clear day, 3 or 4 IFR inbounds, all wanting Visual approaches. They haven't uttered the phrase "Cancel IFR" so, iaw MATS Pt.1 you still have to sequence them in such a way that, although they may be approaching visually, IFR separation is not eroded. In short - you cannot treat it as a VFR procedure with all that entails.