;17th–19th centuries 
 *"... before rapidly being taken by Parliament and then changing hands again following in 1643 following the battle of Edgehill". 

 *"To form these new defences, the buildings outside the old city walls were cleared and six large bastions were attached to it along the north and east sides of the city". To what is the "it" after "attached to" referring? The subject appears to be the plural "old city walls. 

  
 ;Today 
 *"... and advising that urgent repairs being undertaken to some sections". I can't make sense of that.