Both the TCX7006 Ibiza & TCX7052 Palma are showing as cancelled when I just had a look at the Bristol departure board.
Both return flights on the Bristol Airport website are showing as delayed.
The Palma Airport website is stating that TCX7053 is expected to depart to Bristol at 22:55 (11hrs 45 mins late) with the arrival from Bristol expected to arrive at 22:00.
There is no record of the TCX7006/TCX7007 on the Ibiza Airport website which is likely to mean it was cancelled.
Even if the Zakynthos managed to depart on shedule it is not meant to arrive back into Bristol until 21:20 meaning a relief aircraft is likely to be flown into Bristol to operate the delayed Palma flight unless passengers have been bussed to an alternative departure airport.