Labour have held the South Shields seat with an overwhelming victory for Emma Lewell-Buck, while UKIP's Richard Elvin claimed a clear second ahead of the Conservative Party.
The Lib Dems have endured a horrendous result, trailing the BNP, the Independent Socialist Party and an independent candidate.
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The Metropolitan Police Federation, which set up the official JustGiving site, said it felt a "suitable amount" had been collected.
There is no evidence the Westminster attacker Khalid Masood was associated with so-called Islamic State or al Qaeda, the Met Police said.
Janet Ajao said in a statement: "I do not condone his actions nor support the beliefs he held that led to him committing this atrocity."