Radio Staion coverage

[spyinthesky]

Odd one this

 

On my car radio I listen fairly regularly to Radio 5 Live on 909 AM

 

Recently whenever I am in the Lordswood/Lordshill area the station automatically changes to the Traffic Announcement mode and a repetitive piece of 'music' plays under the Global Radio banner.

 

Understand Global Radio is the operating company for Heart, Smooth and Capital stations

 

Interested if anyone has a (sensible!!) explanation

 

Thanks