Nothing unusual, the UK has a huge assortment of modified unmarked and marked performance cars. Cosworths, Evos, WRX's, modified BMW's, Range Rover Sport's etc.
Displaying P plates is distasteful though as they should be displayed to make other drivers aware of their potential actions. All for them having undercover cars to catch the idiots who want to race them but p plates are issued for a reason and shouldnt be made a mockery of.
Incidently I was reading the impounding stats in Saturday's Herald Sun and good to see the vast majority are falcadores and hopefully showing the authorities where the attention needs to be directed. Wonder if they will start driving pink VL's with gauges on the bonnet soon.