The AAIB were not criticising the crews actions in regard to the icing encounter, it was criticising the post incident actions of the Company, with regards to not securing the DFDR immediately after landing and the length of time it took for the MOR to reach the CAA.

The report is here if you want the details

http://www.dft.gov.uk/stellent/groups/dft_avsafety/documents/page/dft_avsafety_030175.hcsp