Contracted out information

FIREDreamer

Is this any use?

xylophone

Would DWP hold anything that would help?

No - as hyubh has indicated, the reference you have is  a contracting out number (where the A presumably stands for APP).

https://www.thepayrollsite.co.uk/help/faq/508.htm

HMRC should be able to tell you to which insurer the ACON was issued.

If not GeneralPortfolio/GAN then which was it?

Marcon

samtoby said:

Would DWP hold anything that would help?

HMRC issued the reference number, so that's who you need to ask.

xylophone

http://policydetective.co.uk/searchResults.jsp#myAnchor

Shows General Portfolio administered by Windsor Life.

molerat

xylophone said:

http://policydetective.co.uk/searchResults.jsp#myAnchor

Shows General Portfolio administered by Windsor Life.

Which is now ReAssure who OP sates they have already contacted.

2011

Windsor Life is rebranded to ReAssure.

https://www.reassure.co.uk/about-us/our-business/

Marcon

molerat said:

xylophone said:

http://policydetective.co.uk/searchResults.jsp#myAnchor

Shows General Portfolio administered by Windsor Life.

Which is now ReAssure who OP sates they have already contacted.

2011

Windsor Life is rebranded to ReAssure.

https://www.reassure.co.uk/about-us/our-business/

...but looks as if these are red herrings. Asking HMRC is likely to yield an accurate answer.