Sony has warned deliveries of CDs and DVDs will be affected after rioters set fire to a key warehouse in Enfield, north London.
The three-storey, 20,000 square metre site is Sony's only such depot for CDs and DVDs in Britain.
"There will likely be some impact on deliveries," said a Sony spokeswoman.
She added that the extent of the fire could not be assessed because it was still burning and it was not possible to enter the building.
:: Intercontinental Hotels Group says its profits have risen by 23% on the back of strong bookings in the US and China,
The chain also said revenue per available room (RevPAR - a key industry measure) grew 6.7% over the first half of the year.
"Whilst we continue to monitor the uncertain economic outlook, we look forward with confidence in the currently favourable hotel trading environment," said new Chief Executive Richard Solomons.
:: Bakery chain Greggs has admitted recent trading conditions have been "more challenging than expected".
Its pretax profit for the first half of the year fell to £17.3m from £18.6m in the same period a year ago.
Eyewitnesses described how they saw a gang of about 20 looters leaving the warehouse with electrical goods before the fire took hold.
A LFB spokesman said: "We were called just before midnight to a warehouse in Solar Way, Enfield.
"Eight fire engines are in attendance and around 40 firefighters have been fighting the fire.
"They are making steady progress and will remain on the scene into the morning.
"There was quite a lot of black smoke and the building has partially collapsed into itself."
Around 200 people staying at a hotel next door to the distribution centre were evacuated as the blaze took hold.
Paul Lewis, a journalist for the Guardian, told the BBC that large plumes of smoke could be seen coming from the 70-metre building which had partially collapsed.
"This is further evidence of the riot spreading in all directions really," he said.
A eyewitness, named as "Tommy", also told the BBC how he saw a number of looters leaving the warehouse with electrical goods before the blaze took hold.
He said he was punched by the culprits as the fled the scene.