Are CDO Equity investments admissible under UK Pru rules?

I am writing a paper on UK institutional investing in Collateralised Debt Obligations (CDO), specifically CDO Equity. I was researching UK insurers, and the relevant legislation (PRU admissible assets). Have any UK insurers managed to make a CDO Equity investment "admissible", and if so how?

Answers:

perhaps here:
http://www.pensions-management.co.uk/new...
pdf: http://www.iaisweb.org/03fsfcrt.pdf#sear...