 Complete the following phrase:  The P25 began racing in non-championship events in September 1955. The cars horsepower proved to be its strong suit, but its handling and reliability problems were quickly revealed. Three Type 25s were entered for Tony Brooks, Mike Hawthorn, and Ron Flockhart in the models world championship debut, the 1956 British Grand Prix. However, none finished. Reliability woes would plague the team during the P25s early development. The large valves were prone to letting debris into the engine, and the single rear disc often failed. A P25 would not finish a Grand Prix until Harry Schells fifth place in the 1958 Monaco Grand Prix. Schell and Jean Behra would finish 2nd and 3rd in that years Dutch Grand Prix. They were the first podiums for BRM. Four more points finishes from Behra, Schell, and new-hire Joakim Bonnier placed BRM 4th in the inaugural Constructors Championship. Bonnier took his and BRMs first victory at the 