OFT on private motor insurance premiums

The press release starts:

The OFT today issued a call for evidence to establish the background to recent reports of rising UK private motor insurance premiums, and consider whether further work may be necessary to improve the way the market works.

There's certainly a problem there - but is it something the OFT can do anything about? One factor they mention is the provision of credit hire vehicles - and in the light of the Veolia case I blogged about the other day, it's easy enough to see how that might be part of the problem.