Williamson's remark on Saturday comes as May is hoping to reach a cross-party consensus on her withdrawal agreement after failing to get it through Parliament three times.
After setting out from Havana's Paseo del Prado, one of the city's main boulevards, the marchers came up against a large number of police and state security forces.
The project is planned by researchers at Radboud University in the Netherlands, and they aim to install a network of dish telescopes around the world to capture black hole images
Apparently, a statement from the Palace regarding the rumoured feud between Kate Middleton and Meghan Markle "spoke volumes" according to a Royal expert.