An author named Andrew Lownie has demanded to see those documents and the British government wants to prevent the author from accessing those. The UK government fears that if made public, those documents can damage the relationship between India, Pakistan and the UK.
A Pakistani website had recently hailed Sidhu for opening up of the Kartarpur Sahib Gurudwara and claimed that it was opened after Imran Khan and Sidhu discussed the same during Khan's swearing in ceremony
Prior to this, Delhi's Arvind Kejriwal govt had come up with quite a logic-defying technique of sprinkling water on the river Yamuna to dissipate the toxic foam