Doesn't seem much doubt about ID:
https://twitter.com/hmsprotector/status/1168617101336166400

The Royal Navy ice patrol ship stumbled upon a mysterious ghost ship while in underway in the mid-Atlantic Ocean earlier this week.

The Royal Navy’s HMS Protector came across the abandoned vessel on August 30, 2019 as it sailed towards the Bahamas to assist with hurricane relief efforts.

The crew on board the vessel attempted to make contact with the ship but received no response in return.

Although the ship’s identity has not been confirmed, it is speculated to be the M/V Alta ex Tananger, which was abandoned back in October 2018 approximately 1,380 miles southeast of Bermuda.

The M/V Alta made headlines after the U.S. Coast Guard rescued its 10 crew members who were stranded aboard the disabled ship for almost 20 days and running low on food and water. The Coast Guard says it was initially notified on September 30, 2018 that the 250-foot Tanzanian-flagged cargo ship was rendered disabled while transiting from Greece to Haiti, and the crew was unable to make repairs.

Cargo ship distressed in the middle of the Atlantic
October 3, 2018
Cargo ship ALTA ex Tananger requested assistance on Oct 1 in position 24 13N 043 48W, in the middle of the Atlantic, some 1500 nm west of African coast, 1100 nm east of Caribbean. The ship is disabled since Sep 19, drifting or slowly moving on north direction. She’s en route from Greece to Haiti, ETA Sep 27. The ship changed owner in late 2017.
Cargo ship ALTA, IMO 7432305, GT 2295, built 1976, flag Tanzania, manager ALTA SHIPPING LLC, USA.

According to several sources including allegedly, ship’s owner, crew of 10 were forced by USCG to abandon the ship.
In July 2019 I was contacted by people via contact form and email, claiming to be ALTA ex Tanangers owners, and asking for help. Understood they contracted salvage company, but company and salvage turned out to be a fake, the ship, according to owners, was hijacked and towed to Guyana. They were tipped on ship’s whereabouts, but couldn’t claim her back, because she was hijacked again, this time from Guyana, in late Spring. And now, early September, she was found drifting in the middle of the Atlantic.
I don’t know what to make out of this story.

Letter from allegedly, ALTA owner:
Hello Mr. Voytenko Mikhail
Our hope is your help.
Our investigation capacities is minimums, last 3 months a anonymous person said us that the MV ALTA IMO 7432305 keeping at British GUYANA. as under hijack. Please we're needing your help.
Believe me that we have been trying for a long time to locate the ALTA IMO vessel 7432305 3 months ago we were informed by an anonymous person that the ALTA vessel had been hijacked in British GUYANA Our research capacity is limited and this creates problems in locating the ship; The pirates are on the lookout.