The last time Menzies did TCX they made a right hash of it....
Let me explain airline handling contract negotiations:
Airline: "Will you be prepared to do handle us for less money than what we're paying now with our current handling agent"
Handling agent: "errrrrrrm - yep"
Airline: "We want many more bells and whistles"
Handling agent: " We'll promise you everything you so desire"
Airline: "You win the contract"