DECC has no research or data-delivery contracts with the University of East Anglia Climatic Research Unit (CRU).
The Met Office, however, uses CRU's land temperature dataset, which is merged with sea surface temperatures to derive the global average temperature record. This is used in quarterly updates to DECC of global, regional and UK temperatures. A gridded version of this dataset is freely available from the Met Office Hadley Centre observations website.