We tortured some folks.

Germany allowed the CIA planes to cross german airspace to Poland for torturing outside of the US, so nothing to boast or criticize about in Germany - we knew exactly what this was for.

Yes, but this relates to British territory being used for the torture, British officials being directly involved in the torture ...and more importantly British politicians repeatedly going on record to lie about it.
Plus of course the looming prospect of British taxpayers having to pay large amounts of compensation for it.