The Polish Office of Electronic Communication (UKE) has granted an extension to DTT trials being undertaken by the POT consortium until the end of the year. POT, which is composed of the national commercial stations Polsat and TVN, began the trials in Warsaw and Srem near Poznan on May 30. They are currently distributing three services (Polsat, TVN and TV4) in MPEG-4 and will in due course also be testing HDTV and DVB-H.