Newcastle United's hopes of redeveloping St James' Park face a major financial and logistical challenge, according to former Manchester City financial adviser Stefan Borson.
The Magpies want to increase the stadium's capacity, but finding a way to do so without sacrificing matchday revenue could prove extremely difficult.
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Newcastle have yet to settle on a straightforward route for expanding St James' Park, with the stadium's location making a major redevelopment particularly complicated.
Borson believes that higher global interest rates could make a major project “quite materially more expensive”, with the eventual funding position of PIF likely to play an important role.
The biggest issue, however, is where Newcastle would play if substantial work required parts of St James' Park to close.
Unlike Tottenham Hotspur, who moved to Wembley Stadium while their new stadium was built, there is no obvious alternative venue nearby that would allow Newcastle to maintain a fully functioning matchday operation.
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Borson suggested the club may therefore have to develop the stadium piece by piece, potentially building behind sections of the existing ground while continuing to play there.
He also believes residential development or a wider commercial element could potentially help bridge the funding gap, particularly given the stadium's location and the involvement of the Reuben family.
Newcastle's owners have faced questions over their ambition following a summer in which Bruno Guimaraes, Anthony Gordon and Sandro Tonali all departed, although the £190 million deal for the new Woolsington Hall training complex has provided evidence of significant continued investment.
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Borson is right to highlight the difficulty here.
Newcastle cannot simply copy Tottenham's blueprint because St James' Park is woven into the city centre and there is no obvious temporary home capable of replacing it.
That does not mean expansion should be abandoned, though.
Newcastle are now a club with the resources and ambitions to need a bigger stadium, and PIF will have to find a creative solution that allows the Magpies to grow without sacrificing the atmosphere and identity of St James' Park.