"police in the UK to lie ...
Technically ... "Misconduct in public office"
Not misconduct in a public office at all. Misconduct is:
"wilfully neglects to perform his duty and/or wilfully misconducts himself to such a degree as to amount to an abuse of the public's trust in the office holder without reasonable excuse or justification"
If lying were are crime the House of Commons would be a lot emptier.
I'll give you an example:
PC: "Billy, we know you were dealing drugs at the school, we've got you on CCTV".
Billy: "No way, I had my hoody on..."
PC: "Thank you for confirming it, there was no CCTV."