"Our attractive, talented boy, died doing what he loved, surrounded by people he loved and who loved him", a statement said.
"He lit up our lives and the lives of his many friends and colleagues, and we will miss him terribly", they said.
"She had a wonderful sense of mischievous fun and was generous to the point of always wanting to see the best in all people, " they said in a statement. R.I.P. Jack: "you were a handsome spirit who always took the side of the underdog".
In a statement, they said: "She was intent on living life to the full and had a wonderful thirst for knowledge, enabling her to be the best she could be".
"Saskia had a great passion for providing invaluable support to victims of criminal injustice, which led her to the point of recently applying for the police graduate recruitment programme, wishing to specialise in victim support". "I think you've had some very good evidence of how that isn't working, I'm afraid, with this case".
The Fishmongers' Hall boss whose staff bravely faced down knife-wielding terrorist Usman Khan has revealed how Polish chef Lukasz engaged in brutal hand-to-hand combat with the killer for more than a minute after hearing guests scream.More news: Elon Musk surprised everyone with his presentation
Mr Johnson told BBC One's The Andrew Marr Show that the other individuals were now "being properly invigilated to make sure there is no threat" and called the convicted terrorist's release from prison "repulsive".
They included two porters named as Andy and Lukasz - said to be a Polish national - who chased the terrorist along London Bridge and helped subdue him using a fire extinguisher and a whale tusk that had been pulled from the wall inside the building.
He had been attending a rehabilitation conference at Fishmongers' Hall when he carried out the attack.
Mr Williamson confirmed the man pictured with the narwhal tusk on London Bridge is not Lukasz, who he says is "too humble" for any recognition, but another man who later picked it up.
The event was organised held by Learning Together, a programme associated with Cambridge University's Institute of Criminology.
He was keen to portray his rival for prime minister, Jeremy Corbyn, as being weak on crime, blaming the Labour Party for bringing in a law that automatically released some prisoners early when it was in government more than a decade ago.More news: "Stop Interfering": China Suspends US Military Visits To Hong Kong
London Mayor Sadiq Khan told Monday's vigil that, in the face of tragedy, people should "take hope from the heroism of ordinary Londoners and emergency services who ran toward danger, risking their lives to help people they didn't even know".
The 28-year-old was part of an al Qaida-inspired terror group and was convicted of terror offences in February 2012.
And former Tory justice minister Phillip Lee - who has since defected to the Lib Dems - launched an attack on Mr Johnson, accusing him of "lying and misleading" in the wake of the tragedy.
Two of the three injured people remained in hospital Monday.
No-one else is being sought over the attack.More news: The Pussycat Dolls Perform For the First Time in a Decade