It is worth reminding people that in the early 1970s the anti-Europe, anti immigration people were the far left wingers in the Labour Party, not the far right.
// In the 1970s and early 1980s the Labour Party was the more Eurosceptic of the two parties, with more anti-European Communities MPs than the Conservatives. In 1975, Labour held a special conference on British membership and the party voted 2 to 1 for Britain to leave the European Communities. In 1979, the Labour manifesto declared that a Labour government would "oppose any move towards turning the Community into a federation" and, in 1983, it still favoured British withdrawal from the EEC. //
// The "No" campaign included the left wing of the Labour Party, including cabinet ministers such as Tony Benn, Michael Foot, Peter Shore and Barbara Castle. Some Labour "No" supporters were on the right wing of the party, such as cabinet minister Eric Varley. The campaign also included many Labour backbenchers; upon the division on a pro-EEC White Paper about the renegotiation, 148 Labour MPs opposed their own government's measure, whereas only 138 supported it and 32 abstained.[2] Some members of the Conservative Party also supported the "No" campaign, although there were far fewer Eurosceptic figures in the Parliamentary Conservative Party in 1975. //