Command RDS-TMC in UK

I understand that RDS-TMC is now broadcast in the UK alongside the Classic FM signal. I've a Merc Command system which is supposed to be RDS-TMC enabled. I've also installed the latest discs. I've set up the unit to create routes using RDS-TMC, and the radio then retunes automatically to Classic FM, but I've yet to see any traffic messages on the screen.

Some questions:

1. I'm confused about why the unit would need to retune to Classic FM - surely it receives the RDS-TMC output quietly in the background without me having to listen to the 1812!

1. Has anyone seen any traffic messages in the UK from RDS-TMC?

2. Also
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   seems content free - but I cannot see anyone yet talking about this in the UK- and I would have thought that the launch of it would be "news" that at least motorists would be talking about. What's going on!?

1. Anyone any idea what I need to do to receive traffic messages through my system?

K.