- Video report by ITV News West of England Correspondent Rupert Evelyn
Among the thousands of police officers from around the world attending the funeral procession of Pc Keith Palmer were six members of Wiltshire Police, who told ITV News they felt compelled to honour him.
Despite not knowing the policeman personally, Inspector David Ibbott said his force had to pay their respects.
He told ITV News: "We're there [in London] not just to remember Keith, but to send a real message out to those who will do our society great harm.
"We're not going to bow down [to terrorism], we're going to give Keith a good send off and we'll be there to protect the public."
The officers travelled the 100-mile journey from Westbury, in Wiltshire, to join Londoners and even colleagues from America and Canada, to line up and watch the officer's coffin make its final journey through the streets of the capital.
Pc Matt Herbert said he hoped Pc Keith Palmer's family would be supported by the strong show of solidarity.
He said: "I'd just like to think they can take some positive from it, that everyone is behind him [Pc Keith Palmer] and them [his family], and offer support".
His views were echoed by Pc Rachel Jackson, who added: "If it was someone from our force - someone we knew - we'd hope someone would do the same. That's why we're here."