Mr Abbas is also due to meet Deputy Prime Minister Nick Clegg and Labour Party leader Ed Miliband.
Mr. Vendrell, who is expected to meet Deputy Foreign Minister Mullah Abdul Jalil in Kandahar on Sunday, said he would urge Taliban officials to provide legal advice to the 16 detained Afghans who were "in very serious danger".
Mr Cameron's announcement came before he and Chancellor George Osborne, a fellow Conservative, were due to meet Deputy Prime Minister Nick Clegg and Chief Secretary to the Treasury Danny Alexander, who are Liberal Democrats, to discuss energy policy.
A person identified as a house sitter met deputies at the residence.
Mr. Kartuzov, a former ambassador to Baghdad, also met Deputy Prime Minister Tariq Aziz.
Under cross-examination he revealed that only days before making his complaint he met deputy prime minister (now prime minister) Najib Tun Razak at his home.
See articleFor the first time since last July, and since violence broke out in Tibet in March, representatives of the Dalai Lama, Tibet's exiled spiritual leader, met deputy ministers from the Chinese government in the southern Chinese city of Shenzhen.
"We are urging all of our partners to help us, to work with us in putting more pressure on the government of Iran to get them to negotiate seriously," Robert J. Einhorn, the State Department's special adviser for nonproliferation and arms control, told reporters in Seoul, where he met Deputy Foreign Minister Kim Jae-shin of South Korea on Tuesday.
The DUP leader said he met Deputy First Minister Martin McGuinness for discussions lasting 90 minutes earlier on Wednesday and would continue to hold such meetings in the future.
Protest representatives who met Deputy Prime Minister Bulent Arinc on Wednesday presented demand which included the dismissal of police chiefs, a ban on the use of tear gas, the release of detained protesters, the sacking of Istanbul's governor, and the scrapping of the plans for the redevelopment of Gezi Park.
