Having been on both sides of the mike, including as ATC in the UK, I would suggest any pilot who doesn't want to "maintain visual" learn how to enter the hold until the skies are absoultely void of other traffic...
"ABC123 number 3 for 27L following the 737 turning final 10 O'clock 4 miles, report the traffic in sight."
"Traffic in sight, ABC123"
"ABC123 maintain visual seperation follow the 737 contact XYZ Tower..."
OR
"Negative contact ABC123."
"ABC123 roger, turn right heading 090 vectors for downwind. You'll be number 5 following a B-747 13 mile final..."
Get the picture?