Why don't you all turn the scrutiny the other way, if sabrina says she is accredited and has the necessary documentation to prove it. Lets trust her and ask the question: So Why is Sabrina not on the list?
Another point, is that where are all the top coaches on these lists? Why are the top trainers not there e.g. Nigel Short, a renowned trainer as well as player who accompanied David Howell to the world junior? If being ECF accredited is THE judging standard then why have the best coaches and trainers not been approached to join and offered help with things like the CRB...
Secondly telling juniors and other improving players that a trainer is not needed is very dangerous advice. Anyone who is anyone in the chess world have all had training.
I am sure if one offered this negative kind of advice in countries like China and Russia, you would just be laughed at. In order to be good at chess, just like in any sport you would need to apply yourself with strict discipline. This is much much easier with a trainer to guide your way.
This is where initiatives like the CCA step in, by giving juniors a chance to have reasonably priced training. Sabrina has also set up a fund in order to help those less advantaged which you are all free to donate to. http://www.chevanneschessacademy.com/sponsorship.html
In time we wish to hold regular monthly classes for our juniors including the occaisional master classes with our elite and simuls like the ones Leonard Barden used to organise. For this we need help either through donating venues for us, raising sponsorship or just volunteers. Lets see who is willing to actually do something for English chess. I bet you I can predict who wont and instead will tap negative things behind their keyboard.
As a footnote, a free venue for training at the British would have meant that we broke even with the costs, as it is Sabrina will make a heavy loss for the in-tournament training not inspiring to run this kind of venture again. You tell me if that is good for junior chess.