A statue of Thatcher in the Guildhall was vandalised in 2002 (Image: GETTY)
In 2002 a different statue of the former Prime Minister was decapitated by a protestor at London’s Guildhall.
The attacker used a cricket bat and metal bar to damage the monument.
Describing how he erected his model in Grantham, Mr Robla said: “There was no breaking and entering. It has a metal fence around it so I've just gone in with my ladder and put it up in about five minutes.
“I had my high vis jacket on and the plan was to say I was measuring the plinth for the council if anyone said anything.