A third man has been arrested on suspicion of murdering antiques dealer Robyn Mercer.
A 25-year-old man is currently in custody after an arrest this morning.
Ms Mercer was found bludgeoned to death outside her home in West Molesey last Monday.
A murder investigation was launched after her body was discovered by a member of the public in Abbey Walk, Walton Road at about 8am on March 14.
A post-mortem examination into her death found she died from multiple blows to the head.
Ms Mercer was a partner at the prestigious, family-owned independent antiques dealer, JH Bourdon-Smith in Masons Yard, London.
Relatives of the 50-year-old released a statement last week.
It read: "We are all utterly devastated to have lost Robyn. She was a wonderful person, loving mother and devoted friend.
"Thank you to all our friends and family for their love and support.
"We would appreciate privacy at this difficult time."
A 52-year-old man arrested on March 14 was bailed until Thursday, April 14, and a 25-year-old man arrested on March 17 was bailed until Friday, May 20.
Surrey Police said the investigation is ongoing.
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