I believe the approx cost for a charter meal is £3, an average sized uk charter airline will carry 4 million pax, so total catering costs per year £12 million. Not a cheap part of airline ops, can’t blame airlines for charging.
I take it by PTV you mean seat back IFE? The A332’s have now been flying for 4.5 years, i think yr find that they were the first uk charter airline to have seat back IFE. They got the A332’s before their competitors.