The NBP prompt market saw major gains as supply dropped on talk of offshore production problems, according to Financial Times. Day-ahead spot gained 26.00p/th, being last quoted at a mid-point value of 127.55p/th. December closed the day almost 6p/th higher day on day at 101p/th, while January was priced at the end of the session at 103.35p/th, also more than 5p/th from Monday’s...