European migrants will be banned from claiming a range of benefits for the first four years after they arrive in the UK, under radical immigration reforms set out by David Cameron.
Pictures from Bluewater in Kent show eager bargain hunters taking to the shops to take advantage of the US-inspired Black Friday sales before Christmas.
Huge crowds gather as Black Friday bargain hunters hit shops in Margate.
This footage was filmed in the Tesco store.
The European Commission has said proposals by David Cameron to restrict welfare payments to immigrants from other EU states will be debated.
A Commission spokesman said: "These are UK ideas and they are part of the debate.
"They will have to be discussed without drama and should be discussed calmly and carefully.
"It is up to national lawmakers to fight against abuses of the system and EU law allows for this."
Greater Manchester Police have arrested a 42-year-old man on suspicion of assault at a Tesco store in the Green End area.
The announcement means three people have now been arrested in Tesco stores in Manchester during the Black Friday sales.
Prime Minister David Cameron said he is determined to reduce low-skilled labour migration from the European Union into the UK.
He said he wants the curbs on the benefits and welfare for EU migrants to be extended across the EU, and that he will negotiate with other EU leaders to obtain them, but but if this is not possible, then he will seek to get an exemption for the UK, which may require a treaty change.
He said the issues surrounding immigration were causing "real concern" for voters across Europe, and stressed the need for reform across member states.
Tesco have said their stores are now "trading normally" after a Black Friday rush that saw police called to help control crowds of bargain-hungry shoppers.
The supermarket said in a statement: "Over 600 Tesco stores have Black Friday offers available in store."
"In the interest of customer safety a small number of these stores contacted police last night to help control crowds safely and stores are now trading normally."
A source at the company said they had taken on board complaints from police about improving in-store security.
"We will work with them following this event to make any improvements for next year," the source said.
The Prime Minister said it was vital that the government dealt with the "real issues" of fairness that increases in net immigration have caused for communities within the UK.
He said pressure on social services, schools, hospitals and local authorities had increased significantly which, combined with a welfare system that pays out without asking claimants to initially pay into was unsustainable. He stressed that the freedom of movement principle on which the EU was built was never an "unqualified right".
Outlining his proposed changes to the UK's immigration policy, Prime Minister David Cameron said problem with the increase in net migration was also a reflection of the UK's problem with welfare. He said it was vital to train young people better so the UK economy will not be as reliant on foreign labour.