UEFA officials will hold key talks with the Government on Monday about moving the Champions League final to Wembley, in the hope of agreeing the switch within the next 24 hours.
The Government will be asked to waive the requirement to quarantine on arrival in the UK for around 1,000 UEFA staff and broadcasters needed to put on the final.
If granted, Chelsea's clash with Manchester City on May 29 would take place in London in front of 22,500 fans.
UEFA insisted on Sunday that the final decision had yet to be taken, but bringing the game to London has emerged as the favoured option ahead of sticking with Istanbul or taking it to another country with fewer travel restrictions, such as Portugal.