Англичанка гадит

Literally, "the English witch befouls". For an incident or crime where it is easy to clue who is the key guilty party behind it, through a lack of formal proofs of such guilt.

The author of wording is believed to be Alexander Suvorov, and the wording initially referred to the foreign policies of British empire which was [believed to be] based on underhand manipulations and plots.

В современном русском сленге, в переносном ироническом смысле любую российскую неудачу в геополитических делах объяснять злонамеренным влиянием западных государств.