The 2015 deal seems to have only been for the main PSB channel. Press reports earlier this year suggested the carriage deal for ITV's other channels was due for renewal in September. Presumably ITV's position was "pay for the main ITV channel, or lose all the others".
If September is correct, I guess there has been some kind of temporary agreement to continue distribution of the other channels
http://www.businessinsider.com/itv-c...n-media-2017-5