Hi Mark,
As I am sure you're aware, we did have five tours featuring Liverpool departures for 2015. Unfortunately this has been dropped down to two for 2016 - which are for Treasures of Andalucía and Costa de la Luz.
Please be assured that when we check for regionals, we check all regional departures for a suitable fit. For the new brochure next year, the aviation team will be making suggestions to Product Managers if they feel that changing day of operation will result in a broader regional offering.
I hope this helps.
Kindest regards,
Monty