Nottingham Forest want to sign Cumbrian goalkeeper Dean Henderson permanently if they stay in the Premier League, according to reports.

The news will put Carlisle United on alert for a potential summer windfall should their former academy player depart Manchester United in a big-money deal.

Henderson is currently on loan at the City Ground and sidelined with a thigh injury.

Forest, who have since drafted in Keylor Navas on loan, are eager to make the Whitehaven star a permanent player, according to a report in the Telegraph.

Carlisle stand to benefit through the terms of the deal that took Henderson from the Blues' academy to Old Trafford back in 2011.

It has also been reported that Man Utd wanted to recall Henderson from his Forest loan after the return of Martin Dubravka to Newcastle United.

The Manchester Evening News claimed Red Devils boss Erik ten Hag called Henderson in an attempt to persuade him to go back to Old Trafford.

Man Utd subsequently signed Jack Butland as back-up to David de Gea.

Henderson has made 20 appearances for Forest so far this season, regaining regular Premier League football after spending last season as second-choice to de Gea at Old Trafford.

He also starred in Forest's run to the Carabao Cup semi-finals, but a thigh injury in Forest's top-flight win over Leicester City leaves him on the sidelines currently.

Former Real Madrid star Navas, on loan from Paris Saint-Germain, made his Forest debut in their 1-0 win over Leeds United on Sunday.

"Dean is progressing fine, but he's still more than a few weeks away from being back in training," said Forest boss Steve Cooper after the game.