Although no promotion or relegation exist in British speedway these changes were taken purely due to financial concerns of the teams that dropped out of the SGB Premiership.
Rye House Rockets who had taken part in the previous SGB Premiership season closed down.
The line-up of teams changed from the previous 2018 league season with both Leicester Lions and Somerset Rebels dropping down into the SGB Championship and being replaced by two 2018 SGB Championship teams Ipswich Witches and Peterborough Panthers.
The biggest change was the introduction of fixed race nights: from now on, all Premiership meetings would be held on either a Monday or Thursday.
Northern Group Table Final Table Up To And Including Monday 22 April The Poole Pirates Vs King's Lynn Stars fixture was not restaged after it was postponed twice Southern Group Table Final Table Up To And Including Thursday 27 June Final SGB Premiership Averages Up To And Including Wednesday 30 October Official Speedway GB Green Sheets Averages[15] Belle Vue Aces 27 June Aarnio replaced Ricky Wells in the Belle Vue Aces team[16] 30 July Nikolaj Busk Jakobsen 5.65 replaced the injured Tero Aarnio in the Belle Vue Aces team[17] 23 August Jye Etheridge replaced the injured Nikolaj Busk Jakobsen in the Belle Vue Aces team[18] Ipswich Witches 7 June Edward Kennett replaced David Bellego in the Ipswich Witches team[19] 27 August Niels-Kristian Iversen and James Sarjeant replaced Edward Kennett and Krystian Pieszczek in the Ipswich Witches team[20] King's Lynn Stars 28 May Craig Cook and Simon Lambert replaced Kasper Andersen and the injured Erik Riss in the King's Lynn Stars team [21] 27 June Broc Nicol and Erik Riss replaced Simon Lambert and Ty Proctor in the King's Lynn Stars team [22] 17 July Nicklas Porsing replaced the planned signed rider Broc Nicol due to his injuries in the King's Lynn Stars team [23] Peterborough Panthers 18 January Chris Harris is released from his Peterborough Panthers contract[24] 27 March Craig Cook is released from his Peterborough Panthers contract[25] 30 March Aaron Summers signed for Peterborough Panthers[26] 21 May Josh Bates and Scott Nicholls replaced Ben Barker and Lasse Bjerre in the Peterborough Panthers team [27] 27 June Ty Proctor replaced the injured Bradley Wilson-Dean in the Peterborough Panthers team[28] 14 August Jason Garrity replaced the injured Josh Bates in the Peterborough Panthers team[29] 27 August Ulrich Østergaard replaced the injured Aaron Summers in the Peterborough Panthers team[30] Poole Pirates 17 July Ricky Wells replaced Nikolaj Busk Jakobsen in the Poole Pirates team [31] 27 August Thomas H. Jonasson replaced the injured Richie Worrall in the Poole Pirates team [32] Swindon Robins 23 May Ellis Perks replaced James Shanes in the Swindon Robins team [33] 2 May Rasmus Jensen replaced Dawid Lampart in the Swindon Robins team [34] 5 June Zach Wajtknecht stood down from the Swindon Robins team with Stefan Nielsen replacing him[35] 19 June David Bellego replaced the injured Tobiasz Musielak in the Swindon Robins team [36] 10 July Claus Vissing replaced the injured Stefan Nielsen in the Swindon Robins team [37] 16 July Tobiasz Musielak replaced David Bellego in the Swindon Robins team [38] Wolverhampton Wolves 14 March Scott Nicholls replaced the injured Jacob Thorssell in the Wolverhampton Wolves team [39] 21 May Jacob Thorssell replaced Scott Nicholls in the Wolverhampton Wolves team [40] 29 June Ryan Douglas replaced Ashley Morris in the Wolverhampton Wolves team [41]