Complex sentence: Road police vehicles in the United Kingdom are generally painted in base colours of white, black, or silver, however silver has become popular in some forces due to the higher resale values after the vehicle's police use is finished.
Split into simpler sentences: Road police vehicles in the United Kingdom are generally painted in base colours of white, black, or silver. Silver has become popular in some forces due to the higher resale values after the vehicle's police use is finished.