R1200RT stalling - running rich

[parkedUp]

Hi experts,
I have a 2008 R1200RT with 130K KM on it. Had it since 13K KM and it has always ran like clockwork.
Recently it's developed a stalling/rough idling problem.
Initially intermittent, it would stall at lights etc after a good run.
After a week, it went to fast idling when cold to kind of normal idling when hot.
Now it won't idle at all (hot or cold) pretty much all the time.
All this has developed in the last 3 weeks & I clock up about 170KM / day (commute).
Today I'm detecting strong fumes as it's running very rich.
My GS911 confirmed this - lamda reading are way on the rich side.
There aren't any fault codes.
Hoping someone can nail this quickly - or point me in the right direction.
I've researched & read some much info that I think I'm confusing myself at this stage.
Attached are readouts from GS911 - note the lamda readings.

Thanks for your time.
Paddy

[parkedUp]

OK - just a follow-up for anyone interested.

Turns out simple enough after.
And the proof was in the real-time scan reports I attached.
The Throttle position sensor was faulty. The rubber seal had gone hard and some moisture had gotten in there.
TPS should drop to zero in the scan report when the throttle is closed.

Excellent article on TPS faults on ukgser forum by Nicholas Van den Berg - thanks Nick.
See it here http://www.ukgser.com/technical/nick/Throttle-Position%20Sensor%20%28All%20BMW%20models,%20'04%20on%29%20V1.0.pdf

Regards,
Pat