Appeal or new claim?

I have long standing depression (dating back to childhood, over 30 years ago) and 6 months ago was diagnosed with ADHD.

I applied for PIP and had an assessment before discovering this website. I've now received a letter saying I didn't score any points at all.

Given that I can probably provide more evidence now, and am probably feeling worse than I was in my original claim, is it worth pursuing mandatory reconsideration and appeal? Or should I just make a new claim?

I have asked for a copy of my original application and also a copy of the assessor's report.

Hi Melusine,
If you continue with MR on the current claim, then if successful you will get back pay to the date of claim. A new claim will only ever start from the date you start again.
Many people get zero points, whether they write a decent form or a poor one, and this can also happen for people who genuinely should get 12 points on both sections. It can be very random.
Don't worry if you feel the form didnt explain your health properly- I have advised clients who wrote their own form and achieved zero points, I then wrote the MR letter and successfully explained that errors were made on the form eg because they didn't understand that you had to be safe or able to repeat the task over the whole day etc.
Think about the so-called reliability criteria - safety, repetition, reasonable time and acceptable standard. Give examples of what goes wrong. You can also say that you have had legal advice since completing the form. (Which is true because you have read the advice pages on B&W!!!)
If you wish to continue good luck. Let us know how you get on.
I hope this helps.
LL26