The information available goes down to transaction level. I get the store name and location, date and amount spent for every purchase.

What is missing is a description of the line items, which would be required for expense reports. It's all very well me saying I spent £20 at Sainsbury's, but my company would want to know what on...

Right: I'd imagine that in order to persuade companies (i.e. corporate expenses departments) to accept these receipts, they'd have to be convinced that they were the same as the paper originals.

Indeed - and more importantly, HMRC (the tax office) would need to accept their integrity. But, Nectar is a sufficiently large organisation as to be able to offer such assurances and for corporates to accept their word - backed up by contractuals, I'm sure!