The man believed to have carried out the attack in Westminster has been named by police as Khalid Masood.
Kent-born Masood, who died in the attack, was not the subject of any current police investigations, but had a range of previous convictions.
The 52-year-old was believed to have been living in the West Midlands.
The so-called Islamic State group has said it was behind the attack, in which PC Keith Palmer, Aysha Frade and US tourist Kurt Cochran were killed.
Eight arrests were made in London and Birmingham following Wednesday's attack.
The Ministry of Foreign and CARICOM Affairs says it has been liaising with the High Commission for the Republic of Trinidad and Tobago in London to ensure that all nationals of Trinidad and Tobago who are in London are safe and aware of the measures implemented by the Government of the United Kingdom in response to the incident which took place earlier today resulting in death and injury.
Four people were killed in what authorities have labelled a terrorist attack outside the Westminster Palace that houses the British Parliament.
The attacker was among those killed.