[1] As of 2016, there were 13 teams competing in this tier of British Speedway, contesting 6 competitions for silverware.
In 2015, Edinburgh Monarchs became the first team to win back-to-back titles since it became the second tier in the sport.
All teams met each other once home and once away, with the League then splitting into two groups using a pre-set formula based on their relative standings at the cut-off point of 10 home/ten away matches to determine the remaining 12 (6 home/6 away) fixtures for each side.
The combined Calculated Match Average (CMA) of the seven riders declared in the team must not be higher than an agreed figure set at the British Speedway Promoters' Association (BSPA) Annual General Meeting.
In 2007, Sheffield Tigers finished 4th but got to the Final, eventually losing to the Rye House Rockets.
The play-offs are usually the last competition of the run during the Premier League season and are contested in October.
In 2011 the play-off's weren't run, although they returned a year later in 2012 with Scunthorpe Scorpions victorious over the Somerset Rebels.
The Competition usually runs throughout the premier league season and the final usually takes place in October.
The current location for the contest is at the Oak Tree Arena, the home of the Somerset Rebels.