Hi,
The Wyeast 1026 would work fine for bottle conditioned beer.
Cask conditioned and kegging are not the same thing. Cask conditioning the secondary fermentation, as well as the conditioning, traditionally takes place in a wooden cask (although SS casks can also be used). The beer is then served unfiltered from the cask via a beer engine (manual pump).
It's a good flocculator (medium/high), making it good for dropping clear in the cask. A quality that makes it great for bottle conditioning, too.
-Dan