Friends of ours who have a child with SNs have just advised us that we should, but we have always assumed we wouldn't get it. And, to be honest, we have always hoped that his situation will improve.
DS1's diagnosis is Tourettes, OCD and generalised anxiety, with autistic traits. He is unable to attend school and has been home educated for a year now. He has a very limited life, as he is too anxious to go out unless it is very local (eg. for a brief walk to a park five minute's away). He can occasionally do longer journeys if he absolutely has to, but we all pay the price. We cancelled our holiday this year because it was so stressful last year and we realised that it was stupid to put all of us through the stress again.
However, DS1 wants to go back to school and he is having CBT treatment to help him cope better with the OCD and anxiety. He tried to do an insight week at a school a couple of weeks back, but couldn't stay longer than a couple of hours at a time. He is going to try again in September.
I never give up hope that things will improve, so that is why I never apply for financial help. But the truth is that I can't work because I have to look after him full time and educate him. Even if he manages to go to the new school, his attendance may be erratic, thanks to his anxieties.
I suppose applying for DLA feels like accepting the situation and I don't want to accept that this is never going to change.