Link to BBC
Well, it appears that British special forces (and apparently some Nigerian soldiers) didn't fare so well against Boko Haram. They tried to rescue two hostages, a Brit and an Italian, but the hostages were killed before they could be rescued. The hostages were originally taken in May of 2011.
Boko Haram is a radical Islamic terror group roaming northern Nigeria. They're loosely alligned with Al Qaeda. The name Boko Haram roughly translates to, "western learning is sinful/forbidden".
I'm somewhat surprised they were still alive when the rescue was planned. It's a pity the Brits couldn't pull off what US forces did in Somalia. Then again, Boko Haram is probably more of a professional organization (as far as things go in Africa) than a bunch of khat-addled wannabe gangsters/pirates.