David Lammy has revealed examples of the racist abuse he has suffered after speaking out in defence of Windrush immigrants.

The British-born Labour MP, who helped shed light on the growing problems faced by people from the Caribbean who have lived in the UK for decades, was sent a letter telling him to “go back to wherever you originally came from” and claiming he should “be grateful that we have taken you in as a black man”.

Mr Lammy, whose parents came to the UK from Guyana, has previously used social media to highlight racist abuse he has received.

In the latest example, he tweeted a photo of a letter sent to his office accusing him of not realising “how lucky you have been and how well treated”.

“For God’s sake man stop your vile and obscene speeches knocking this country down,” it said.

“Be grateful that we have taken you in as a black man and given you a life here, as we have done for all those black people who came to live here.

“Be grateful man for the country that gave you a life, and stop knocking it. Otherwise, go back to your country of your forbears and let’s be rid of you.”

The letter continued: “If you cannot say good about us, then go back, it is as simple as that.

“Your recent speeches have been vile and so unforgiving to a country that has given all that you are, but believe me, we can very well do without you.”

Saying Mr Lammy should “be grateful or go back to wherever you originally came from”, the sender added: “You are like a little child and do not realise how lucky you have been and how well treated, by the country you so easily knock.”

Windrush generation: threat of deportation from UK Show all 15 1 /15 Windrush generation: threat of deportation from UK Windrush generation: threat of deportation from UK The ex-troopship 'Empire Windrush' arriving at Tilbury Docks from Jamaica, with 482 Jamaicans on board, emigrating to Britain. Getty Windrush generation: threat of deportation from UK Jamaican immigrants being welcomed by RAF officials from the Colonial Office after the ex-troopship 'Empire Windrush' landed them at Tilbury. PA Windrush generation: threat of deportation from UK Alford Gardner who arrived in Britain in 1948 on the first Windrush ship to dock in Tilbury, Essex, speaking at his home in Leeds PA Windrush generation: threat of deportation from UK Alford Gardner in Leeds shortly after he arrived in Britain in 1948 on the first Windrush ship to dock in Tilbury, Essex PA Windrush generation: threat of deportation from UK Gardner was 22 years old when he boarded the ship in Kingston, Jamaica, with his brother Gladstone before they and hundreds of Caribbean migrants called on to rebuild post-war Britain disembarked the ship in Tilbury Docks PA Windrush generation: threat of deportation from UK Alford Gardner (right), during his RAF service in 1947 PA Windrush generation: threat of deportation from UK The son of Ruth Williams, a Windrush-generation immigrant, wants to the leave the country after threats of deportation. According to his mother, Mr Haynes applied for British citizenship in 2016 but was rejected, despite Ms Williams having lived in the UK almost permanently since arriving from St Vincent and the Grenadines in 1959. Ruth Williams, 75, said she felt "betrayed" by Britain after the Home Office twice turned down applications for her 35-year-old son, Mozi Haynes, to remain in the country. Ms Williams is understood to have cancer and said she relies heavily on her son for support. PA Windrush generation: threat of deportation from UK The British liner 'Empire Windrush' at port in 1954. Getty Windrush generation: threat of deportation from UK Ruth Williams, 75, with her British passport. "I feel betrayed and a second class citizen in my own country," she said. "This makes me so sad and the Home Office must show some compassion. "I am unwell and almost 75, I live on my own and I need my son to stay here. I need my family around me and I can’t face being alone. He has applied to the Home Office and been refused twice." PA Windrush generation: threat of deportation from UK From the top, hopeful Jamaican boxers Charles Smith, Ten Ansel, Essi Reid, John Hazel, Boy Solas and manager Mortimer Martin arrive at Tilbury on the Empire Windrush in the hope of finding work in Britain. Getty Windrush generation: threat of deportation from UK Jamaicans reading a newspaper whilst on board the ex-troopship 'Empire Windrush' bound for Tilbury docks in Essex. Getty Windrush generation: threat of deportation from UK After half a century in Britain, Anthony Bryan decided it was time to go abroad. But the decision set off a nightmare that saw him lose his job, detained twice and almost deported to Jamaica. AFP/Getty Windrush generation: threat of deportation from UK Jamaica-born Anthony Bryan poses outside his home in Edmonton, north London. Now 60 and a grandfather, Bryan thought the issue could be resolved swiftly, as he legally moved to Britain with his family as part of the Windrush generation of Caribbean migrants after World War II. In 1948, the ship Windrush brought the first group of migrants from the West Indies to help rebuild post-war Britain, and many others followed from around the Commonwealth. A 1971 law gave them indefinite leave to remain, but many never formalised their status, often because they were children who came over on their parents' passports and then never applied for their own. AFP/Getty Windrush generation: threat of deportation from UK Three Jamaican immigrants (left to right) John Hazel, a 21-year-old boxer, Harold Wilmot, 32, and John Richards, a 22-year-old carpenter, arriving at Tilbury on board the ex-troopship 'Empire Windrush', smartly dressed in zoot suits and trilby hats. Getty Windrush generation: threat of deportation from UK Newly arrived Jamaican immigrants on board the 'Empire Windrush' at Tilbury in 1948. Getty

The letter was signed with what is believed to be a fake name and listed a fake address in Newcastle.

In response, the Tottenham MP wrote on Twitter: “I was born in the Whittington Hospital [in north London] the son of Windrush migrants. And I will speak for them.

“Let me be clear: following the 1948 Nationality Act my parents and the Windrush generation were invited here as British citizens. Learn your history. Citizens have been retrospectively renamed as ‘immigrants’ as a result of legislation and policy pandering to far-right rhetoric.”

The former minister is understood to have received dozens of racist letters in recent months but this appears to be the first linked specifically to the Windrush scandal. It was dated 16 April – the day he asked an Urgent Question on the issue in the House of Commons and claimed the government had been “inhumane and cruel” in its treatment of migrants.

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Mr Lammy has called for Amber Rudd, the home secretary, to resign over the issue and accused Theresa May of “crocodile tears” after she apologised for the difficulties Windrush immigrants have faced.

He said: “The apologies made by the Prime Minister are merely crocodile tears given that her department was fully aware of the human cost that these policies would have.

“It is extraordinary that the Home Office ignored yet more warnings about the impact that their pernicious policies would have.”

The Windrush row erupted after a government clampdown on illegal immigrants forced people who have lived in the UK for decades to produce documents to prove their right to stay.

The difficulty in accessing documents, some of which were previously destroyed by the government, led to some of the Windrush generation being unable to prove their residency rights and therefore lose healthcare, jobs, pensions and, in some cases, be threatened with deportation.