It is a not very bad REF as your employment is of national interest (First paragraph).
The key is the second paragraph. Prepare them as requested.
3rd and 4th are general statement.
As you are not allowed to resubmit old evidence, you may request more reference letters from your current department head, even school dean, or other big names in the field to clearly and strongly argue the importance and great interest to nation although no citation is available. You may also present evidence from your software users. New publication does not help a lot, but can be submitted as a evidence to show you are continuously and fruitfully engaged in the field of national interest.
Lastly and most importantly, you need to write a very strong cover letter which should include key past achievements, highlights of strong comments in references, papers, published commentary on your papers.
I don't think withdrawal of this petition will affect your new petition as the criteria are different. Try your best to reply, nothing is impossible.
The key is the second paragraph. Prepare them as requested.
3rd and 4th are general statement.
As you are not allowed to resubmit old evidence, you may request more reference letters from your current department head, even school dean, or other big names in the field to clearly and strongly argue the importance and great interest to nation although no citation is available. You may also present evidence from your software users. New publication does not help a lot, but can be submitted as a evidence to show you are continuously and fruitfully engaged in the field of national interest.
Lastly and most importantly, you need to write a very strong cover letter which should include key past achievements, highlights of strong comments in references, papers, published commentary on your papers.
I don't think withdrawal of this petition will affect your new petition as the criteria are different. Try your best to reply, nothing is impossible.