England saw signs of how good Tamim was out in the Desh, but today the world saw it. To make a better-than-run-a-ball century, at Lord's, irregardless of country, is a spectacular event, as seen by the long standing ovation Tamim received when he finally fell for one big shot too many. While naysayers can say England didn't bowl well or that they should have played a five man attack (or Broad), cricket must stand an applaud a fantastic achievement from the 21 year old.
Tamim is the shining light of the Bangladesh team, which begs the question of how good can he be? He will undoubtably be the best Deshi player over the next 5ish years, but on the basis of that innings, he could fit his way into any test team in the world. It was a Sehwag-esque innings, and that's no exaggeration.
Bangladesh may well lose this test match, and will probably lose the next one as well, but Tamim's reputation and confidence will have been enhanced by what was one of the best test innings Lord's has ever seen. Take a bow, son.