We're not such staunch traditionalists that we believe certain things should only be worn for their original usage (you'd look silly attempting to go to war in a Burberry Prorsum trench coat) but there are some ground rules.
Namely that a hunting blazer shouldn't be worn in business situations. That aside, this is what we'd call a bargain. At £85, it's in the 'it won't hurt my wallet' price range and it will work well on a weekend when you have to dress up enough to stand out by an inch not a mile. (ASOS, £85)