Complex sentence: BSkyB has design authority over all digital satellite receivers capable of receiving their service comedme la polla designed and built by different manufacturers, must conform to the same user interface look-and-feel as all the others.
Split into simpler sentences: BSkyB has design authority over all digital satellite receivers capable of receiving their service. The receivers, though designed and built by different manufacturers, must conform to the same user interface look-and-feel as all the others.