Hi west, I would advise you to start from prelim again. Only reason being is that the "warning" you gave was for over 2 months ago.
The reason the schedule is set out whereby you give 14 days notice for prelim and
lba
is so that should your claim go to court you can demonstrate you have given them plenty of notice.
This is the same with your claim, you may have given them notice - but notice on a claim that was coming 2 months ago. You may have problems if you just file your claim now and if it were me, to be on the safe side I would give them the time to sort it.
On the bright side, your claim (should it go to court) will be bigger due to the increase in
interest
!
This is, of course, just my opinion and what I would probably do.