A jury hearing the trial of four alleged members of an IRA active service unit at the Old Bailey in London spent yesterday listening to detailed accounts of their movements.
On the fifth day of the trial of Mr Brian McHugh (31), Mr Patrick Kelly (31), Mr Michael Phillips (22) and Mr James Murphy (26), prosecuting counsel Mr David Waters told the court the men had been tracked in and out of the capital.
Police and surveillance officers from the security forces, he said, were able to monitor, photograph and even video the defendants, who kept in contact with one another by using pagers.
A fifth "vital" Provisional IRA member, Mr Diarmuid O'Neill (27), was, it was said, shot dead by an officer referred to in court as "Kilo" as police stormed a hotel in west London where members of the cell were housed.
Mr McHugh and Mr Kelly Michael Phillips as he left his work at Gatwick Airport and Mr Murphy as he slept at his Chelsea home.
Mr McHugh, Mr Kelly, Mr Phillips and Mr Murphy each deny conspiring to cause explosions.
The court has been told that the defendants used three storage units to keep Semtex and ammunition and that they planned to mount a "devastating" bombing campaign in London.
Yesterday Mr Waters outlined surveillance evidence allegedly gathered on the respective defendants over a weekend in late August last year.
Mr Phillips, of Trinity Close, Crawley, West Sussex; Mr Murphy, of Wiltshire Close, Chelsea, west London; Mr Kelly, of Co Longford; and Mr McHugh, of Glenthorne Road, Hammersmith, deny conspiring to cause explosions and possessing explosive substances.
The trial continues.