Thank you for advertising Scotland's Glass, Sue - unfortunately Sea Shanties are still in the queue.
The 1986 sales brochure shows/lists 6 designs:
CT436 Clipper ("half" of chriss' design - cannot exclude a seagull on the other side)
There were other subjects, though - possibly added later, and I just don't have the brochure (if one existed). I have images (off ebay) of a Sea Shanties with just Seagulls - and have seen a few with mixes of several designs.