Table:
text: 1955 Formula One season
Season review
Season review
Race Circuit Date_ Pole_position Fastest_lap Winning_driver Constructor_ Tyre Report
British Grand Prix Aintree 16 July Stirling Moss Stirling Moss Stirling Moss Mercedes C Report
Italian Grand Prix Monza 11 September Juan Manuel Fangio Stirling Moss Juan Manuel Fangio Mercedes C Report

text: 1955 Formula One season
Season review
Season review
Race Circuit Date_ Pole_position Fastest_lap Winning_driver Constructor_ Tyre Report
Argentine Grand Prix Oscar Gálvez 16 January José Froilán González Juan Manuel Fangio Juan Manuel Fangio Mercedes C Report
Monaco Grand Prix Monaco 22 May Juan Manuel Fangio Juan Manuel Fangio Maurice Trintignant Ferrari E Report
Indianapolis 500 Indianapolis 30 May Jerry Hoyt Bill Vukovich Bob Sweikert Kurtis Kraft - Offenhauser F Report
Belgian Grand Prix Spa-Francorchamps 5 June Eugenio Castellotti Juan Manuel Fangio Juan Manuel Fangio Mercedes C Report
Dutch Grand Prix Zandvoort 19 June Juan Manuel Fangio Roberto Mieres Juan Manuel Fangio Mercedes C Report

Question: What was the fastest lap time of the British Grand Prix season in review when Mercedes was the constructor in the 1955 Formula 1 season?