We recently looked into the possibility of including our 2nd and lower XV in the RFU leagues and were firmly told that they had to stay below Level 7. That ruled out a number of teams and would have risked blocking the top of Level 8 with others, so we dropped the idea. Last season there was a South West Pilot League with teams from several SW counties. This coming season we have an experimental District Premier League of our own for most such teams.AIUI 2nd XVs can play in D&W division 1s.
This was Chippenham's concern for many years (and may well still be)... that while their 1st XV was playing level etc, their 2nd XV couldn't play in a league above level 8, leaving their second string step ups hugely below the expectations of what they would come against.
didds