On Jun 2, 9:40 pm, Fig wrote:
I took the opportunity of riding the HEX today for free (engineering work
on Pic).

I did the same*. I noticed there's a quiet carriage which doesn't play
any videos:
http://www.heathrowexpress.com/content.asp?pageid=41

(* if anyone was wondering if the phrase "Underground Travelcard"
means National Rail ODTCs will be rejected, the answer is no)

U