These new type of wall plates are becoming the standard in preparation for digital terrestrial. Note the fully screened metal block at the rear of the wall plate, this is intended to minimise the risk of interference or noise which is essential for digital reception. These wall plates should be used in conjunction with a fly lead (Wall plate to TV or Sat) using CT100 / BSKYB approved double screened cable.
Especially useful if you have a large amount of cables to the rear of the TV, the wall plate and fly lead will prevent the signals from other leads entering the main TV cable (Interference).