Originally Posted by
LchChester
Assuming it is less than 24 hours in london, your destination will be Amsterdam for the purpose of EU261, and you may file a claim under denied boarding accordingly.
However, according to the BA forum:
If you would like to file a claim, you can go for the small claim tribunal, which is a pretty simple application (but the process is still prolonged). Remember to target Asiamiles instead of Cathay Pacific
Doesn't EC261 apply because the flight is operated by BA?
However, with less than 24 hours in London followed by three days at AMS, it would be viewed as IOM to AMS and the intraEU limits would apply.