[QUOTE 2304655, member: 259"]I meant the raw meat of course. I wouldn't eat that kind of stuff even if was made out of beef!

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It's been quite a few years since I had any involvement with identifying horsemeat but my experience was that while prime horse and beef would smell slightly different (in part down to the different feed regimes) old cow meat wasn't far off that of old nag horse.Oilier fat on horse, though, and while someone very experienced in handling both meats would probably recognise the difference straightaway, it's not something that is immediately obvious.
I had at one point to undergo a practical food exam (all part of the training for being authorised to seize food) and one of the tricks of the examiners was to throw in some horsemeat and see who would identify it as beef!
As to how long this has been going on, it's difficult to say. Intermittent cases of meat substitution on a small (regional or national supply) scale has been a fact for years. One example - back in the 80s a local butchery chain was prosecuted for including kangaroo meat in its schools supplies. What the economics of that was is anybody's guess but someone must have been flogging it at a giveaway price to make it financially worthwhile. More typically, getting unfit meat back into the food chain has been the main fraud, with some circumstantial evidence of links to organised crime. Again, though, they have tended to be fairly localised scams, albeit financially very lucrative ones.
The EC system of approved premises and traceability is supposed to stop this kind of fraud getting any kind of a hold on an international basis. However, if someone does successfully introduce such meat into the system, there is not much to stop it being traded on repeatedly because the regulation is designed to provide a way of permitting cross-border trade without further border control inspection being required.