Bugger. I thought there might have been some other cases on the DSRs since then.
Yep, I worked on this. High Court proceedings against OFT, followed by a ref to the ECJ. AGs opinion was against us (as were French and Spanish govts), but Court found in our favour and decided that car hire was a "transport service" and, therefore, exempted from the cooling off periods in the DSRs. If ECJ had found against us it would have had a huge impact on the ability of the client (and other online car hire businesses) to operate.
I'd call that a win.