Adelaide SB @ Commissioners is a double-left too, though I believe that's due to Adelaide never being extended in Westminster Ponds, rather than a foresight in planning..
Though in general London needs a lot more double-left turn lanes. I don't know whether it's a lack of space in some areas to implement them, or a lack of foresight, but there are lots of intersections that could use it.
Two that could use it ASAP
-Wellington SB @ Commissioners could use one, whole intersection is a gong show.
-Baseline WB @ Wellington, area is backed up heavily cause of the hospital.
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Unfortunately I don't believe that those intersection improvements are going to be implemented with Southdale widening @ Wharncliffe this year. The design plans I've seen leave the intersections as is, guess it would be too logical to do them at the same time.. Hope I'm wrong, but knowing London they won't do it this year.
Southdale Widening:
http://www.london.ca/Tenders_and_RFPs/Tender2013/T13-32Add2.pdf
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