I don't know whether the French industrial action at the weekend played a part but TUI seemed to have some disruption at Bristol. On Sunday afternoon one of the two based B738s operated the Heraklion flight several hours late. The morning Malaga on Sunday normally operated by one of the two based B757s returned in mid evening (several hours late) as a B 787-9, G-TUIJ. FR24 appreared to suggest the outbound 757 went to LGW from BRS where seemingly it was swapped for the 787-9.
Today FR24 shows G-TUIJ operating from BRS on a delayed flight to Larnaca that should have left yesterday afternoon.