D carrying out roadworks when it negligently served an electricity cable to C's smelting works. This interrupted a batch of ingots being produced by the world in a special melt procedure; and further planned melts has to be shelved. The power failure meant thag the ingots in the melt were prematurely cooled, thus damaging the metal and ruining the consignment.
D could recover damages for:
Damage to the metal (physical loss-damage to property)
Loss of profits relating to the damages metal which could not now be sold (consequential loss-economic loss and a consequence of the physical loss)
D could not recover damages for:
Loss of profits on "melts" planned for the period during the power loss (pure economic loss)