Aden Flint set to leave Boro in the next 24 hours
The Boro defender is set to join Championship rivals Cardiff City.
Aden Flint is to leave Middlesbrough FC in the next 24 hours, after Boro accepted a bid from Cardiff City.
The centre-half will undergo a medical with Cardiff City, before completing his move to South Wales.
The fee is reported to raise to £6 million, with an initial £4 million paid upfront for the former Bristol City defender.
Flint joined from The Robins last summer for £6 million on a four-year deal, however Jonathan Woodgate is keen to put his mark on the squad in which he inherited from Tony Pulis.
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Cardiff City manager Neil Warnock is keen to add height to his defence, with 6ft 6in Flint fitting the bill.