On Friday, December 12, 2014 12:38:18 PM UTC, Robin wrote:
"Five common brands of consumer unit were selected for the first
stage of the investigation. Initial tests showed that only two of the
five brands included flame retardant in the plastic enclosure material,
although there is no requirement in the applicable product standards
to do so."

I thought the existing Wiring Regulations required all connections / live parts to be in an incombustible enclosure?

Therefore the common brands of CU which are combustible are simply not fit for the purpose and are returnable to the retailer under Sale of Goods Act.

Owain