By Editor Wayne Veysey| Former Evening Standard, Press Association and Goal chief correspondent with 17 years experience of breaking big stories, including exclusives like this

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Fulham would get a £5million windfall from Manchester City if Patrick Roberts joined another Championship club on loan, Football Insider sources understand.

The 18-year-old is set to be loaned out by the Premier League giants in the final days of the January window, with Celtic the favourites to clinch a deal.

A City source has told Football Insider that there is a clause in the Roberts transfer agreement between the Citizens and Fulham stipulating they would have to hand over a staggering £5million sum if the winger moves to a club in the same division.

Roberts joined Manuel Pellegrini’s team from the Londoners last summer for an initial £4.5million rising to £11million.

The potential £5million windfall is one of a number of ways in which the transfer fee would be bumped up to £11million.

As revealed by Football Insider, Celtic have opened preliminary talks with City over a January deal to sign Roberts.

Money man: Fulham owner Shahid Khan could be in line for a windfall

Money man: Fulham owner Shahid Khan could be in line for a windfall

The latest Manchester City transfer news is that the Scottish giants want to tie up the 18-year-old winger on loan until the end of the season.

The teenager is regarded as one of the outstanding players in his age group in the country but has featured just once in the Premier League this season – a four-minute cameo in City’s 4-1 defeat at Tottenham in September.

Roberts has also twice appeared in the League Cup for City, coming on as a substitute in the victories over Sunderland and Crystal Palace.

Celtic manager Ronny Deila wants to make the England Under-19 international his second signing of the January window following the arrival of defender Erik Sviatchenko.