There are at least three bands called TBC
The oldest is TBC from Sweden. They started out as a progg band, but when the punk wave hit they changed their sound to a more punkier.
The second is a Hip-Hop Instrumental band from Chomutov, in Czech Republic. Mainly producer and Dj is Michael Klega, teen music talent.
The third is a group from the United Kingdom. A tour band for the Christian organization, innervation Trust, along with thebandwithnoname. Their website says this about the band: Read more on Last.fm