GWR Bristol is billed as a "contemporary and chart music and information station", but an Ofcom Content Sampling Report claims the station playing only 47% of contemporary music (music from within the last two years).
"Ofcom today issued a Yellow Card warning to GWR in Bristol for operating outside the music obligations of its format," the regulator said in a statement.
"If we find that these issues have been addressed when we monitor the station again, after Monday 23 March ...
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