According to this article in the Telegraph, it would seem so.:

...evidence has now emerged suggesting that the well-guarded Sony DADC distribution centre was deliberately targeted by a professional gang, in a carefully planned raid, using the riots as a distraction.

Sources in the security industry disclosed that intruders first arrived wielding specialist cutting equipment and spent up to two hours dismantling a high security fence before breaking in.

It is claimed that they then summoned a fleet of vans and drove inside the premises, which are set back from the main focus of rioting in the area, before beginning to load up stock.

According to one source, security guards on site were effectively overwhelmed and unable to fend off the intruders, knowing that police were already stretched as anarchy gripped the capital.

The plot thickens… it did seem a bit unusual that a warehouse removed from the main riot areas went up in flames. Fans of independent music will be relieved to know, however, that Sony have set up a new distribution HQ to help avert bankrupycy by the labels effected by the fire.

Previously on Dangerous Minds:
Independent music distributor PIAS lose entire stock in London Riots