Irfan Naseer, 31, Irfan Khalid and Ashik Ali, both 27, are part of a group of 11 men accused of being behind the plot.
Prosecutor Brian Altman told the jury examination of a laptop used by the trio showed a search for "muhammed siddique khan as sahab", who was one of the London bombers.
In a taped conversation, Naseer is heard discussing the bombings and agreeing with another man it had gone "a bit wrong" and that not enough damage had been done.
"You know what? They didn't put the nails and stuff in, man," Naseer is heard saying. The accused are also said to have searched YouTube on the laptop for "The devil's deception of the fake jihadis" and "Taliban fighting videos"; and on Fox News, "homemade bomb found in women's restroom in Detroit".
The men also joked about their last meal before the attack and finding a second wife in paradise, Woolwich Crown Court heard.
The three are accused of engaging in conduct in preparation of terrorist acts, which they deny.
Naseer is accused of five counts of the offence, Khalid four and Ali three, all between Christmas Day 2010 and September 19 last year.
Besides the alleged bombing campaign the three, all from Birmingham, are also accused of collecting money for terrorism and recruiting others for terrorism.
Naseer and Khalid are also accused of travelling to Pakistan for training in terrorism, and it is alleged Naseer also helped others to travel there for the same purpose.
A search of Khalid's apartment had also un-covered a large amount of extremist literature by radical clerics and books, the jury was told.
The trial has been adjourned until Monday.