For the 2011 IPMS Nationals at Telford, the club had decided on a theme of "Weddings" for the stand display. This was divided into four sections based on the old saying "Something old, something new, something borrowed and something blue". These were then used as the subject of four of the club's monthly competition leading up to the Telford show. David Francis built some Police cars with working lights and sirens for a couple of these competitions and the Telford display.
Here is a few videos of these models showing the lights and sirens working.