Pakistan Peoples Party (PPP) leader, Asif Ali Zardari left for London on Thursday, party spokesman Nazir Dhoki told AFP.
Dhoki did not give details but other party officials said Zardari would meet chief of the Pakistan Muslim League-Nawaz (PML-N), Nawaz Sharif on Friday.
Nawaz was already in London where his wife underwent surgery announced last Friday that the deposed judges would be reinstated on May 12.
The coalition partners will discuss the report of an expert committee they set up to work out a framework for the restoration of the judges.
Officials said the committee at a meeting here overnight finalised a draft resolution to be endorsed by parliament.
Law Minister Farooq Naek said the draft was ready but there were divergent views among legal experts on whether the judges should be reinstated through an executive order or through a package of constitutional reforms.
"The draft resolution has been finalised by the committee," he told reporters late Wednesday.
"The outcome of the committee's deliberation will be forwarded to PPP co-chairman Asif Ali Zardari and PML-N chief Nawaz Sharif for their decision," Naek said.

Copyright AFP (Agence France-Presse), 2008