It never did. It is still the proper protocol in the UK for women to curtsey when they meet UK royalty.
There is no 'river UK' !
The origins are very ancient and cannot be attributed to any particular civilisation. They are traditional gestures of greeting by an inferior to a superior. The practice is now less common, but in European circles it is still traditional to bow and curtsey in front of royalty
Etam UK ended in 2005.
KLM uk ended in 2003.
The Takeover UK ended in 2011.
UK Horizons ended in 2004.
Borders - UK - ended in 2009.
Play UK ended in 2002.
Entertainment UK ended in 2009.
Commonweal - UK - ended in 1894.
Automata UK ended in 1985.
TRL UK ended in 2005-12.