1999–00 Premiership 1

Each side played one another twice, in a round robin system, home and away, to make a total of twenty-two matches for each team. The bottom side would play a two legged promotion-relegation playoff against the Premiership 2 league champion to decide who be in the division for the following season. == Participating teams ==

The season began on 10 September 1999. Points increased from 2 to 3 for a win after the World Cup in November 1999. This was an attempt to ensure competitive balance in the leagues for teams while they were without their international players. ==Results==

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12th place Bedford faced 1999–00 Premiership 2 champions Rotherham in a two legged playoff to see who was promoted or relegated. • Rotherham win 40–34 on aggregate and are promoted to 2000–01 Premiership Rugby. ==Attendances==

Note: Flags to the left of player names indicate national team as has been defined under World Rugby eligibility rules, or primary nationality for players who did not earn international senior caps. Players may hold one or more non-WR nationalities. Most points Source: Most tries Source: ==Note==