Only two Semillons make the Langton's clissification. Andrew Thomas belongs there, too, in my opinion. In the meantime, you can enjoy his wine for much less than the others.
The 2010 Thomas Braemore Semillon comes in the typical lime and citrus spectrum. What impresses about this wine is the piercing linearity of the palate profile. It has a combination of fruit intensity and minerality not dissimilar to a Chablis premier cru. The finish is bone dry without plucking your mouth.
There is still a lot of primary fruit on the palate. This wine will live for a long, long time.