They don't care.
Quite true. Nor should the British public be concerned in any way. It is not their issue.
As for the American public, I’m afraid there is little sympathy also. Many conclude that all US Citizens should pay US taxes. Form 2555 is seen by some in Congress as tempting ‘low hanging fruit’, and in the recent past, have put forward Bills which would have it eliminated. They, wrongly, believe tax revenue would increase. Form 1116 would remain, since it is required for those living in the US with foreign income sources.
A percentage of Americans abroad are on 1 to 5 year assignments from a US firm. Many have ‘equalisation’ packages which cover tax reporting. For them, it may be a side issue and not a major concern. That leaves an isolated group of ‘US Persons’ who have made the decision to reside abroad permanently. They do not have one voice in Congress, and whilst they may appeal to the President (in writing), their voices to Congress are split into 50 different States. Their plight becomes significantly watered down amongst all the many other local issues confronting their Congresspersons and Senators. Nonetheless, if enough overseas Americans wrote their representatives, the issue might demand some notice.
Most of us are aware of the 3 organisations attempting to represent Americans abroad in these issues. I’m sure they would appreciate any support offered by Americans abroad subjected to these issues.