Is there a website on which I can find the reasons for historic delays and cancellations?

I’m about to submit my claim for EU261 comp for my cancelled LHR - AUH flight yesterdqy but I would like to check back on the offcial reason for my delay on my BKK to LHR flight on 13th November. The ground staff in BKK told me it was due to a lightening strike, but I’d like to be sure. Thinking back I have a feeling they may have said a lighting issue, which got me thinking it may have been something to do with a rolling delay due the the runway light issue at LHE earlier this month.