Found a nice looking WTP fare on ITAMatrix: "British Airways (BA) QLX4S4T1 JER to CUN"
£167 fare component each way, for a total of £581 with taxes etc.
However the fare rules start with:
VALID FOR ADULT. THIS FARE IS VALID FOR A SPECIFIED
ACCOUNT CODE. CONTACT CARRIER FOR DETAILS.
OR - FOR ADULT. THIS FARE IS VALID FOR A SPECIFIED ACCOUNT
CODE. CONTACT CARRIER FOR DETAILS.
OR - FOR ADULT.
I've not seen this before - does it have a practical effect on booking or anything?