Originally Posted by BA6501

A flight with an additional stop wouldn't help anyway - not much leaves LHR after 19:00 to North America, and even if you take one of those, you'd need to overnight in the US, so doesn't really resolve your problem.
Options would be another date (if the schedule varies enough to allow for a same day connection), or indeed an overnight in London (plus meals, etc), as duty of care. They will not commit to that upfront (indeed, they'll say it's at your cost), but put in a claim after travel and you'll be fine, as long as you're reasonable.