Originally Posted by Phlyer2

Let's break this down. Some of the terms here are doing some heavy lifting to create a story of distress with a rather small fact base. Yes, it sounds distressing, but I'm missing the smoking gun here. There might be a cause for alerting the BA police, but the only bits of the story that stand up here as written are that a BA staff member was talking to a passenger quickly and she asked him to slow down - and he didn't.

Let's break it down:

a (male) BA gate agent - Relevance of being male?
a distressed passenger - Speculative observation
a middle aged lady - Relevance of middle aged or lady?
I was sufficiently close to hear part, but not all, of the conversation - So we don't have all the facts
in which the gate agent (who was speaking quickly - Opinion and relevance?
and aggressively - opinion
with a strong accent which may be difficult to follow - "may be" - opinion
made various assertions which any frequent flyer would know to be complete nonsense - unclear and unspecified
it was unclear to me whether that lady is an experienced traveller) - relevance?
the lady became increasingly distressed - opinion
asked him to slow down to enable her to understand - fair point
and then asked for assistance - fair point
as she was increasingly distressed - opinion
he refused, laughed and threatened her with removal from the flight twice - lacking facts as to why / what was said
I don't know all the facts - agreed
I overheard just part of the conversation - but there did not appear to be any obvious risk: she was not drunk, abusive etc. - "appear to be" - speculative
Anyone would find that conduct distressing - opinion
and had she been neurodiverse, all the more so - and if she wasn't?
I'm almost embarrassed to write this - I would be too
but I doubt if the gate agent would have treated a male passenger in the same manner - opinion
I'd like to alert someone at BA to this but don't know where to start - don't based on this fact base
If I send in a customer service complaint, I'll simply get a template reply - agreed
Can anyone suggest to whom I might report this? I have the agent's name, the gate number and the time so it should be possible for someone at BA to investigate - investigate what? A speculative journey through a partially heard conversation with a fair sprinkling of assumption? I'd leave it.