Expat package - question

Hi We have asked an employee to relocate for work and pay for an annual trip home for him and his family. He also travels to Dublin with work.

The current trip is a mix of work and holidays. He has brought his family with him and is tacking on holidays at the end of the trip. The employee has put in for a lieu day for traveling days as we asked him to travel on the weekends given our time constraints. At first, reasonable enough, but given that we all travel on the weekends when we are on holidays, I am wondering what our policy should be.

Love to hear your thoughts