Bournemouth are close to signing Lewis Cook from Leeds United for £6m, with the midfielder set for a medical on Friday.

Eddie Howe has agreed a fee for the England Under-19 international, who has one year remaining on his contract. Leeds had been hopeful of agreeing new terms with Cook, whose progress has also been monitored by Crystal Palace.

With Cook set to depart, the Leeds owner Massimo Cellino has insisted he will resist interest in the club’s young left-back Charlie Taylor, despite the defender having entered the final year of his contract and offered no indication he intends to stay. Burnley and Middlesbrough are considering bids of around £5m. West Bromwich Albion are also suitors for the 22-year-old and Newcastle United, rebuilding under Rafael Benítez in the Championship, are monitoring the situation.

Yet Cellino has suggested he would rather lose Taylor without a transfer fee – Leeds would be due compensation if they offer the player a new deal – than sell him this summer. “I’m very disappointed with the way he has acted,” the Leeds owner told the Daily Mirror. “We are not going to let him go. Trust me. I promise, even if we lose him at the end of the season for free, I’m not selling him.”

Taylor, who has spent time on loan at Bradford, York, Inverness and Fleetwood Town, was Leeds’ player of the year last season.

Leeds have completed two deals. The striker Kemar Roofe has signed on a four-year deal from Oxford United for an undisclosed fee understood to be around £3m, while the Swansea midfielder Matt Grimes has joined on a season-long loan.

The 23-year-old Roofe began his career at West Brom, and scored 18 goals in 40 league games for Oxford last season, winning the League Two player of the year award. His departure represents a club record sale for Oxford.

Facebook Twitter Pinterest Kemar Roofe, photographed at Oxford earlier this year. Photograph: Felix Clay for the Guardian

Roofe told the Leeds website: “It’s an amazing feeling. I don’t think I’ll actually realise how big the club is until the first game of the season, but I’m amazed by what I’ve seen so far. You can tell there’s something exciting happening here with the signings we’re making – they’re all good signings.”

The deals for Roofe and Grimes follow the arrivals of Marcus Antonsson, Kyle Bartley, Hadi Sacko and Robert Green.