This would have been a month ago.
And I'm not kidding.
No. Nelson is untouched atop his column. What you've read about is other statues on lower plinths in Trafalgar Sqare, of which there are several.
Are you talking about this...from a few years back?
http://www.latinamericanstudies.org/caribbean/statue.htm
That's completely untrue. Where did you get the information from? Nelson has never been removed from his column, nor shall he be.