British rap group called Rhyme Asylum. I'm American, so listening to rap with a British accent was weird for me at first, but is easy to get used to (kind of like Tinie Tempah). They only have two albums and have since taken a hiatus, but I have never come across a group with such consistency when it comes to clever lyrics and wordplay. I want to put emphasis on the fact that if you aren't someone who pays really close attention to lyrics/wordplay, this probably isn't for you.