Could Blackburn aircraft replace the Swordfish?

Would the raid have been more successful if Blackburn Blackburn aircraft had replaced the Swordfish?

No. The Blackburn Blackburn could not carry torpedoes, and an Adriatic approach would have increased the risk of interception.

The proposed substitution fails on the basic weapons requirement: the Blackburn Blackburn could not carry torpedoes. Launching a different strike from Fiume into the Adriatic would also create a greater chance of Italian interception. Aircraft availability mattered only if the type could perform the mission. Force X's Adriatic role belonged to the wider operation, but it did not make the Blackburn suitable for the torpedo strike.