John Rowland wrote:
At the junction of Swandon Way and the east end of Smugglers Way, I believe
the traffic engineers have screwed up the signs which you see when
approaching from the east. The left hand lane has its own slip road for
turning left (which isn't relevant). The right hand lane has its own traffic
light with red, amber and green right arrow, and a blue forced right turn
sign beneath. Next to this is a light for the centre two lanes, which has a
normal red-amber-green with a banned *left* turn sign beneath - I believe
this is supposed to be a red-amber-green forward arrow with blue
forward-only arrow beneath. There is no physical barrier between the
right-hand lane and the other lanes, although the right hand lane tarmac
bears a right-turn arrow and the central lane has a forward arrow.

Aerial phot here
http://maps.live.com/default.aspx?v=...2009&encType=1

I see that as three lanes with a right turn green arrow on the pole at
the right, and a standard green light at the left. The 'no left turn' is
probably intended, but the 'must go right arrow' is wrong.

So, is it legal for someone turning right to obey the green light over the
banned left turn sign and ignore the red light over the forced right turn
sign?

It looks technically not legal for someone going straight ahead to
ignore the red light at the right of the carriageway. But it is such a
pig's ear that no prosecution should succeed at that junction.