There has been quite a bit of talk over the last year that for a variety of reasons bedbugs are "back", world wide..", so if you think it's ony a problem with BA and on their aircraft....
For example not a high brow source, but FWIW:
https://www.usatoday.com/story/news/...now/399025001/
Google will reveal plenty of similar..
.
https://www.pestmagazine.co.uk/en/ne...idemic-discuss
(That's from "Pest, Independent News for Pest Professionals".......... Sorry, just had visions of HIGNFY)
I don't know where BA figure on any scale of airline furnishing cleaniness but I
do know the problem isn't ignored and that reports of infestation are taken seriously with all sorts of measures taken, including using bed bug sniffing dogs...
And ExXB has a point, of course without denying the story it does appear the DM has a bit of an agenda at times...
Anyhow I'll bet with a bit of research you'll find BA isnt the only airlne that has had bed bug incidents, but not everybody writes to the DM.
( as if by magic..here you go, one of many:
https://loyaltylobby.com/2016/07/20/...nd-passengers/)