The takeover of the Hong Kong Stock Exchange on the LSE marks the latest in a long series of proposals for the London Stock Exchange over the years.

It also threatens the $ 27 billion (£ 21.9 billion) takeover of the Refinitiv data provider, which could spell another chess agreement by the US. LSE.

Here is a summary history of failed mega-merges LSE:

– March 2017

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The London Stock Exchange (Nick Ansell / PA)

A £ 21 billion merger with German rival Deutsche Borse collapsed after its blockade by the European Commission.

After a year of talks, it was the third attempt at rapprochement between the two companies after setbacks in 2000 and 2005.

– February 2011

The LSE has agreed to merge with its Canadian rival TMX Group, which operates the Toronto Stock Exchange.

But the deal was dropped in June 2011 after the LSE was overtaken by a competing bid for TMX presented by the rival Canadian consortium, Maple.

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The LSE had previously rejected an offer from the Nasdaq American Stock Exchange (Ian West / PA)

– March 2006

The LSE denies an offer of $ 4.2 billion (£ 3.4 billion) from the Nasdaq Stock Exchange, which triggers a hostile battle.

The Nasdaq agreement was subsequently canceled in February 2007.

– December 2005

The Australian investment vehicle Macquarie launches a hostile approach to the LSE, but abandons the continuation of trading in February 2006 after admitting its defeat.

– December 2004

Deutsche Borse, the LSE's long-term suitor, submits a £ 1.3 billion offer on the LSE, but rejects the offer in March 2005.

August 2000

Swedish Stock Exchange OM launches a hostile public offer of 900 million pounds sterling on the LSE.

It falls in November 2000 after receiving the support of only 6.7% of LSE investors.

May 2000

The LSE unveiled for the first time a merger project with Deutsche Borse, but reached agreement only four months later.