Even if it is a drive, you can't go wrong with Solar Solutions. I just had my Clubman S tinted by Carlos a couple of weeks ago (20% all around incl. sunroof). He does a quick and very reasonably priced but top-notch job and stands by his work. He is also very easy to work with.
Carlos also tinted my Cooper S a couple of years ago and everything was perfect, which is why I am a repeat customer. He uses high-quality tint (no cheap crap that is going to turn purple) and my tint still looked brand-new when I went to trade in the car last month.