Ahead of England's World Cup last-16 match against Mexico in Mexico City, several off-the-pitch factors have become part of the build-up:

Lightning and storms: Weather forecasts have raised the possibility of afternoon and evening thunderstorms, including lightning and hail. FIFA reportedly considered moving the kick-off earlier to reduce the risk of weather disruption, although no final change had been confirmed at the time of the reports.

Heavy hotel security: England's hotel is under extensive police and National Guard protection after Mexico supporters disturbed Ecuador's players before their previous match by gathering outside the team hotel with horns, loudspeakers and fireworks. Ecuador later lodged a complaint with FIFA. England have prepared measures such as white-noise machines, earplugs and sleep aids in case similar tactics are attempted.

Spying concerns: Reports say manager Thomas Tuchel chose to keep key tactical training sessions at England's secure base in Kansas City rather than in Mexico City, partly because of concerns that opponents or others could observe training. England's US base reportedly offers screened pitches and enhanced security, including anti-drone measures.

Altitude: Mexico City's elevation (about 2,240 metres / 7,350 feet) means lower oxygen levels, making recovery between high-intensity efforts more difficult. Mexico have already played several matches at altitude during the tournament, while England arrived only shortly before the game, limiting acclimatisation time.

Hostile atmosphere: Despite efforts to keep their hotel location private, hundreds of Mexican fans gathered when England arrived, booing the team and chanting "Mexico." Security around the hotel and the stadium has been increased further following crowd safety concerns in the city after Mexico's previous match.

Overall, England's preparations have involved not only football considerations but also contingency planning for weather, security, privacy, altitude and an intense home atmosphere.