A comeback of sorts was seen during the 1960s and 1970s, but it was not until 1981, when the Liberals allied with the newly formed SDP to form the SDP-Liberal Alliance, that the party enjoyed significant electoral success.

During 1988, the Liberals formally merged with the SDP to form the Liberal Democrats, though a small splinter Liberal Party was formed in 1989 by former members opposed to the merger.

The Social Democratic Party ( SDP ) was a centrist political party in the United Kingdom that was created on 26 March 1981 and existed until 1988.

Although the SDP was seen as being largely a breakaway from the right wing of the Labour Party, an internal party survey found that 60 % of its members had not belonged to a political party before, with 25 % being drawn from Labour, 10 % from the Conservatives and 5 % from the Liberals.

SDP polling agents were given special dispensation by the Returning Officer to have placards outside of polling stations to state which one on the ballot papers was the ' real Roy '.

In 2010 Geneva City Council was made up of two representatives of the SDP ( Social Democratic Party, one of whom is the mayor ), one member of the FDP ( Free Democratic Party ), one member of the Green Party and one member of the À gauche Toute party.

In 1993 SDP chairman Ulf Sundqvist was suspected and later convicted of a large financial fraud.

In 1981, dismayed with the Labour Party's continuing leftward drift, he was one of the " Gang of Four "-Labour moderates who formed the Social Democratic Party ( SDP ).

As one of the so-called " Gang of Four ", he was a founder of the Social Democratic Party ( SDP ) in January 1981 with David Owen, Bill Rodgers and Shirley Williams.

He was well regarded by other Labour statesmen including Tony Benn, but came under heavy criticism from others including Denis Healey, who condemned the SDP split as a " disaster " for the Labour Party which prolonged their time in opposition and allowed the Tories to have an unbroken run of nearly 20 years in government.

Officially, this was the desired answer for the SDP delegation that had visited her two days earlier.

In August 1958, Karl-August Fagerholm's third cabinet, a coalition government led by the Social Democratic Party ( SDP ) and including Kekkonen's party Agrarian League, was formed.

Kekkonen had warned against this, but was ignored by SDP.

That year, he was supported by five political parties: the Centre Party, the Social Democrats, the Social Democratic Union of Workers and Smallholders ( a short-lived SDP faction ), the Finnish People's Democratic League ( a communist front ), and the Swedish People's Party.

Shortly after entering the House of Commons, he was appointed SDP – Liberal Alliance spokesman on Trade and Industry and then on Education.

" Long Island Wildin '" was a collaboration with Japanese hip hop artists Kan Takagi ( Major Force ) and trio Scha Dara Parr ( SDP ).

* The designation of the party leader was made by the party's congress in the eighteen remaining parties: Austria ( SPÖ ), Bulgaria ( БСП ), Czech Republic ( ČSSD ), Estonia ( SDE ), Finland ( SDP ), Germany ( SPD ), Hungary ( MSZP ), Latvia ( LSDSP ), Lithuania ( SDPL ), Luxembourg ( LSAP ), Malta ( LP ), Poland ( SLD, UP ), Rumania ( PSD ), Slovakia ( SMER-SD ), Slovenia ( SD ), Spain ( PSOE ), Sweden ( SAP ), United-Kingdom / Northern Ireland ( SDLP )

Originally a Labour Member of Parliament ( MP ) and Cabinet Minister, she was one of the " Gang of Four " rebels who founded the Social Democratic Party ( SDP ) in 1981.

The SDP – Liberal Alliance was a centrist electoral pact formed by the Social Democratic Party ( SDP ) and the Liberal Party in the United Kingdom which was in existence from 1981 to 1988, when the bulk of the two parties merged to form the Social and Liberal Democrats, later referred to as simply the Liberal Democrats.

The formation of the SDP and the subsequent alliance came at a time when the British economy was in a deep recession and Margaret Thatcher's Conservative government was proving deeply unpopular as unemployment had risen from just over 1, 500, 000 since they came to power in May 1979 to 3, 000, 000 and beyond by 1982, mainly due to the closure of many factories as part of the battle against inflation.

A political-action faction led by Victor Berger left the SDA convention and founded the SDP as an explicitly socialist alternative to the mainstream parties.

By that point, his reputation had so declined that Bill Rodgers, who had been Brown's Parliamentary Private Secretary at the DEA and the Foreign Office, described him as " an embarrassment rather than an asset to his old friends who founded the SDP.

When the Party was founded, few people took it seriously and many commentators speculated that the ultimate purpose of HSU was take away pensioners ' votes from rejuvenated SDP and thus help ruling HDZ remain in power.

The SDP was founded on 6 August 1980 by lawyer Chiam See Tong, who had previously contested several elections as an independent candidate in the 1970s, together with consultant engineer Fok Tai Loy and businessman Ernest Chew Tian Ern.

In the 2000 general elections, the SDP formed a coalition with the Party for Bosnia and Herzegovina ( SBiH ), a party founded and led by former wartime prime minister Haris Silajdžić, to gain the majority and force the nationalist parties out of power.

The party was founded in 1909 as the Social-Democratic Party ( SDP ) and merged with the Pacifist Socialist Party, the Political Party of Radicals and the Evangelical People's Party in 1991, forming the centre-left GreenLeft.

On March 14, 1919 the dissenters founded a new party called the Social-Democratic Party ( SDP ).

In May 1918 the Left Wing founded the journal De Internationale uniting four opposition groups within the SDP, with groups in Amsterdam, Rotterdam and The Hague plus the Zimmerwald Left Propaganda Union.

It was originally founded as Sociaal-Democratische Partij ( Social-Democratic party ; SDP ).

The current SAK was founded in 1969 as the Finnish Federation of Trade Unions ( SAK 1930 – 1969 ), controlled by SKDL and TPSL, and the Finnish Trade Union Federation ( SAJ 1960 – 1969 ), controlled by SDP, settled their disputes and merged.

The SPP was founded in 1994 by Sin Kek Tong, who led a pro-Chiam See Tong faction out of the Singapore Democratic Party ( SDP ).

Chiam founded the Singapore Democratic Party ( SDP ) in 1980, and was the party's Secretary-General ( leader ) until 1993.

The resulting by-election was notable as it was won by Shirley Williams, one of the " gang of four " senior members of the Labour Party who had founded the new Social Democratic Party ( SDP ), becoming the first SDP member to be elected.

It was founded by 1994 by members of Social Democratic Party of Croatia dissatisfied with the centrist policies of SDP leader Ivica Račan and his lack of criticism towards Franjo Tuđman.

The SDP was founded in April 2002 as a merger between Social Democracy ( SD ) and the Social Democratic Union ( SDU ).

In 2002 the SDU merged together with Social Democracy ( SD ) and founded the Social Democratic Party ( SDP ).

Chiam remained an SDP member and MP until shortly before the 1997 general election, when he left to join the Singapore People's Party ( a party founded in 1994 by ex-SDP members who were supportive of Chiam ).< ref >

Over two-thirds of the members, and all the serving MPs, of the Liberal Party joined this party, led first jointly by Steel and the SDP leader Robert Maclennan, and later by Paddy Ashdown ( 1988 – 99 ), Charles Kennedy ( 1999 – 2006 ), Sir Menzies Campbell ( 2006 – 07 ) and Nick Clegg ( incumbent ).

After a ballot of members and the passing of a motion at the 1987 Portsmouth conference, the party merged with the Liberal Party in 1988 to form the Liberal Democrats, although a minority left to form a continuing SDP led by David Owen.

The Lipponen cabinets set the stability record, and were unusual in the respect that both moderate ( SDP ) and radical left wing ( Left Alliance ) parties sat in the government with the major right-wing party ( National Coalition ).

Lipponen headed the SDP campaign in 1999 which resulted in losses, but the SDP remained the largest party in the parliament.

Splintered by factionalism over the economy and Iceland's role in the European Union ( EU ), the SDP also suffered from being the only party to support Iceland's EU membership application.

Four Labour MPs who defected to the SDP in early 1981 said they voted against Healey to land the Labour Party with an unelectable left-wing leader and so help their new party.

Following the establishment of the SDP by the ' Gang of Four ' ( Roy Jenkins, David Owen, Bill Rodgers, Shirley Williams ), who had left the Labour Party in March 1981, the new party entered into an informal alliance with the existing centre party, the Liberals, led by David Steel.

Both the SDP and the Liberal party were committed to proportional representation, under which system they would have elected more MPs to the House of Commons.

In the 1987 general election, the share of the vote for each party fell slightly ; the Liberals won 17 seats ( the same as in 1983 ), while the SDP won five ( one fewer than four years previously ), while Labour were firmly established as Britain's second political party with a much stronger showing than in 1983, although the Conservatives still achieved a third successive election win with Mrs Thatcher still at the helm.

Small factions of both parties established new parties under the names of the SDP and the Liberal Party but, as each was made up of those members who least trusted the other party, there was no chance that the two ' continuing ' parties would co-operate.

) Owen and the party's national executive dissolved the party in 1990, but another group of party members continue the party under the SDP name.

Steel was convinced the answer to these difficulties was a single party with a single leader, and was the chief proponent of the 1988 merger between the Liberals and the SDP.

However, when it became clear that the NCP and the SDP would continue to support EU bailouts, which the True Finns vehemently opposed during the electoral campaign, the True Finns voluntarily broke from the negotiations in order to become the leading opposition party.