And what damages? Mfer won it all.

British Broadcasting Corporations first answer would simply be - we're a UK broadcaster governed by UK law, sue us in the right court first.

Second answer would be that the BBC is a regulated broadcaster and is subject to those regulations.... Has DJT filed the appropriate complaint with the regulator?

In any case the BBC is probably under particular scrutiny by the US right wing because the BBC does have a significant US presence. If a major non-English speaking broadcaster were to broadcast the same stuff and not in the USA these right wing Yanks wouldn't be saying a thing and DJT would be clueless.

Has Trump reimbursed Christopher Steele as it has been ordered to.

What if a UK court said they will not hear any complaint until Trump pays?

BBC tried to placate this useless sack of rotting protoplasm and, predictably, he wants more.

They should have stood firm and refused to provide any ceremonial sacrifices (resignations). Then told Trump to do something anatomically impossible to himself.

They just fanned the flames of Trump’s inexhaustible fountain of grievance.

for all of his actions...

$1 billion sounds like a good starting point....