Reportedly, HTC stated in an email that its 3D Android handset “will go on sale through Vodafone and distributors in six major European countries.” Unfortunately, it's not quite clear if these six countries include the UK – so maybe Vodafone did cancel the handset's launch, but only on British territory.
In any case, Vodafone UK is already offering the HTC Sensation, which comes with all the features you'll find in the Evo 3D, sans 3D capabilities though (these aren't that useful anyway).
source: Unwired View