Was an Alexandretta landing a serious alternative?

How seriously did the Allies consider landing at Alexandretta to cut the Ottoman railway to Palestine?

Not seriously enough; it had strategic merit, but French opposition to British action in its claimed sphere blocked momentum.

The alternative would land forces at Alexandretta to cut the Ottoman railway serving Palestine and pressure the southern front. The idea deserved more consideration as an additional operation rather than a substitute for every Dardanelles objective. Its political obstacle was French concern that a British landing would intrude into France's claimed sphere of influence. France was not strong enough to mount the operation alone, leaving a strategically interesting option without the coalition backing needed to execute it.