The Cabwise text service is pretty good to find a more reasonably priced licenced cab. I had a terrible experience with Addisson Lee and would never use them again. The driver turned up over an hour late, he couldn't speak english and I doubt he even had a driving licence. He drove me down the road on the wrong side, through the red lights and down a one way street, we ended up at a dead end under under a railway arch and I thought that was it for me. Thankfully he was genuinely lost and I finally got home after 45 minutes of fannying about and got out without paying. The only good thing was he couldn't argue back!