My flight MCO to GLA via LGW was cancelled with less than 72 hours notice. BA rerouted me via EI with MCO-DUB-GLA, arriving in GLA 2hours 50mins later than I would have. Is it right that zero compensation is due because of it only being 2 hours 50mins OR does the DUB-GLA portion count for EU261, as that caused me to be late on an intra-EU flight?

thanks for any advice, as I was treated shoddily at all times.