I asked for this to be escalated and just got the following. I guess it’s off to ADR time.
I understand your concerns about the reasons given for the outcome of your claim, especially around whether the delay was caused by a third party or involved only easyJet aircraft.
After looking into the details for flight EZY2268, I can confirm the delay was due to a third party supplier at the airport who caused damage to the plane scheduled to take you to Manchester. Once the aircraft was parked at the gate, the damage had to be checked. Unfortunately, the damage was quite significant and couldn’t be repaired, so we had no choice but to delay your flight.