in the UK at least.. many brands are showing a ££££ symbol with a rough guide to cost levels against brand (and some other) searches

anyone seen an article where someone has worked out where this comes from -- think its partly from Google product but not sure price points are that accurate. I haven't got time to check it out properly right now and someone is asking..... I'm sure someone on t'interweb has already blogged it?

You use itemprop="price" - http://schema.org/docs/gs.html

Is that what you're after?

nope, not that. I'll get a screenshot if I can get it to do it again - basically it shows ££££ against each listing, where ££££ is cheap and ££££ is more expensive. Currently I can force it on some embedded map listings but not showing by default on the main serps.

It might be only showing on brands with product feeds, but it certainly shows on brands without mark up. I'm not sure how it calculates it as john Lewis, for example, shows at the same price range as Argos, which doesn't sound very likely to me!