Four New York heavyweights have secured advisory roles on the proposed $45bn (£27bn) merger between US cable operators Comcast and Time Warner Cable.

Merger terms have been agreed between the two companies but the deal could still be scuppered y regulators, amid concerns that the combined entity would control as much as three quarters of the cable industry in the US.

Paul Weiss Rifkind Wharton & Garrison and Skadden Arps Slate Meagher & Flom won the mandate to advise Time Warner on a deal that could be one of the most valuable M&A transactions of the year.

Comcast turned to Davis Polk & Wardwell, while Willkie Farr & Gallagher is advising on regulatory matters.

The Skadden team is being led by New York M&A partners Stephen Arcano and Ann Beth Stebbins. Corporate chair Robert Schumer led for Paul Weiss, alongside the practice's deputy chair Ariel Deckelbaum and fellow M&A partner Ross Fieldston.

Davis Polk fielded a team led by M&A partners David Caplan and William Chudd.

For Willkie Farr, the firm's Washington-based communications, media and privacy department chair Frank Buono is leading, alongside media partner Jim Casserly.

The same Paul Weiss team acted for Time Warner responding to an unsolicited $61bn (£37bn) merger offer from Charter Communications last month.

On that proposed deal, Charter – a smaller cable company operating in the US – mandated Wachtell Lipton Rosen & Katz and Kirkland & Ellis.