Have just had both our car insurance renewal documents through, both with Direct Line. £445 for my Subaru, £323 for wife's Honda. (I know many other companies are cheaper, but I have had favourable experience with Direct Line whan making a claim and at least their call centres are in UK).
Any way, decided to put both our details back into their website, and up grade to "Guaranteed Hire Car Plus". Now mine is only £368 and wife's is only £284. Total saving £116 (would have been £136 saving with out the upgrade.
I suggest any other Direct Line customers out there do the same. I was tempted to change companies but I'm sure they're all of equally dubious moral virtue.