Doubts have been cast on whether ailing Lloyds Banking boss António Horta-Osório will return from sick leave before the end of this year, after the company said non-executive director David Roberts would sit in as interim chief executive officer if Horta-Osório's return is delayed. Chief financial officer Tim Tookey is currently sitting in the chief exec's chair, but he is due to move on to Friends Life, a division of insurance outfit Resolution, in February 2012. The part-nationalised lender also revealed that Nathan Bostock, presently Royal Bank of Scotland's (RBS) head of restructuring and risk, will not now be leaving RBS to take charge next year of Lloyds' wholesale banking division. Acquisitive insurance group Resolution, which has recently been the subject of press speculation over the possible acquisition of Phoenix Group Holdings, has confirmed that talks with Phoenix have been terminated.FTSE 100 - RisersNoneFTSE 100 - FallersLloyds Banking Group (LLOY) 23.53p -6.61%Petrofac Ltd. (PFC) 1,302.00p -6.47%Fresnillo (FRES) 1,611.00p -5.84%Rio Tinto (RIO) 3,120.00p -4.76%Barclays (BARC) 158.90p -4.51%Burberry Group (BRBY) 1,190.00p -4.34%Resolution Ltd. (RSL) 238.40p -4.22%Vedanta Resources (VED) 967.50p -4.21%Kazakhmys (KAZ) 827.00p -4.12%Antofagasta (ANTO) 1,032.00p -4.09%--jh