Advent International, the global private equity group, has bought a Hungarian radio station from GWR Group, the UK radio broadcasting group and owner of Classic FM, after it was forced to make provisions for write-downs in its Hungarian businesses.

Advent said it hoped the acquisition of Danubius Radio for €30m ($35m) would help it cash in on an anticipated boost to radio advertising following Hungary's accession to the European Union next year. The advertising market has tripled in size since 1997, when broadcasting regulations were revised.