The emergence of Poetry Spotlight is one of the most interesting recent developments in U.K. poetry on the internet. The site itself explains one key reason why it's different:
What hopefully sets apart a little from other poetry sites is that all poems featured are accompanied by a short interview with the author. A poem doesn’t appear out of thin air and it’s nice sometimes to learn a bit more about the person who penned it. Turns out they are often as interesting as the writing they produce.
However, there's also a second factor that makes Poetry Spotlight stand out: the quality of the questions. Each interview is underpinned by a knowledge of the featured poet, thus leading to fascinating replies from the interviewees. I especially recommend the piece on Richie McCaffery (see here). Terrific stuff!