ok thanks I understand now(excuse my grammar or any mistakes, I'm on my phone)*
Firstly forget the cert he as that affects nothing as it's a lower qualification
So your eligibility is
4+1-2=3
That means 4 years is your new course and plus a gift year, takeaway your two years of previous study doing the mchem gives you 3 years of funding remaining.
So what that means *you get 3 years of full funding but you must self fund in your first year of your new course.
Self fund means they will pay maintenance loan but you won't get any tuition fees.
If you send in compelling personal reasons then you can get full funding for 4 years instead of 3 l.
For compelling personal reasons you need to send in a cover letter explaining what happened, how it affected you etc and also attach professional evidence, as you mentioned bereavement this can be a death certificate but send is as much stuff as possible so try get a tutor or someone from the university to give you a letter
I hope this helps, sorry for the bad formatting as I'm on mobile.
So just to clarify - you would have 3 years of funding available for a full time course and would have to self fund first year unless you send CPR
If you need further help, let me know.
Cheers *