This was copied and pasted from their site:
DUAL SITE PRODUCTION
British Dragon now produces tablets at two locations. The potencies of the tablets are identical. However, there are minor variations between tablets from each of the production sites.
Tablets made at the new site are slightly thinner, when compared side-by-side with tablets from the older site. The tablet from the new production site is on the right in the photo example.
The colors of the tablets from the new production site may vary slightly from original-site tablets, but still are extremely similar to the colors as described on our product information pages. The top row of tablets in the example to the right are from the original production site. The bottom row of tablets are from the new production site.