In message , at 02:26:39 on
Mon, 31 Oct 2011, Basil Jet remarked:
More data: the brand new layout at Palmers Green has separate lanes for
turning left and right off the North Circular, and the same thing has
been done, i.e the going forward lanes have no signage apart from the
green arrow (and lane markings), and the turning right lanes have a no
u-turn sign but no forced right sign apart from the green arrow. So
it's not a temporary cock up but a systemic failure IMO.

Near where I live there's an old set of traffic lights with three lanes
for left, right and ahead, which has the same directional control of
lane markings and green arrows, but no "forced left/right" signs (by
which I assume you mean the blue arrows).
--
Roland Perry