Student Finance England - Estranged Student

I am applying for estranged student status for my final year of university. I have had a meeting with my university's inclusion officer to explain my situation with my mother, and she has written me a letter that I will use as my third-party evidence.

Is it advisable to also attach letters written by family members also? For example, the estrangement is from my mother. My sisters could formulate their letters as they are close to the situation (and have also cut our mother out of their lives).

Please let me know if I need to clarify any details. Thank you for reading.