I found this graphic lurking at in an old PC folder. It shows that the ETRFC 2nds played until 2012 in Zoo Shield Div 1. The Cougars dominated MMT1 (now renamed MMT Premier) until 2013, when they were renamed the Amateurs 1sts, and entered the Zoo Shield, getting promoted from Div 3 to Div 2 in 2015. The Men's 2nds were pretty tidy as well playing mostly in MMT2 (now renamed MMT1).

The amateur teams are generally referred to as "The Ams" but actually the "Ams 1sts" were first "The Cougars", then briefly "Ealing Amateurs 1sts", then "Men's 1sts" and finally "Ealing Trailfinders 1871 1sts" when the new Ealing Trailfinders 1871 RFC affiliation was created for the 2019/20 season.