English Football Association chief executive Mark Bullingham has said the organisation is hopeful Wembley could be full of supporters for the Euro 2020 final this summer.
UEFA confirmed on Friday morning that Wembley has been awarded an additional fixture after Dublin was unable to host the four matches as originally planned having been unable to guarantee entry to fans.
The round of 16 game will feature England if they win Group D and the stadium will be at a minimum of 25% capacity for the entire tournament.
However, the FA have until June 2 to indicate whether that figure could increase dependent upon advice from the United Kingdom government relating to the coronavirus pandemic data and in consultation with UEFA.
"We would obviously love the final to be full, if the authorities were to allow that. From our perspective, we think that 50% might be more realistic at the moment," Bullingham said. "But if the situation improves, and the authorities allow, we would love the final to be full. We want as many fans as possible to be able to experience the Euros.
"We are guaranteed 25% for the whole tournament. Our hope and expectation is that we get up to a higher number after the group games -- so if you view the round of 16 game together with the semifinal and final.
"Our hope is that we will be at least 50% full for those games, but clearly that is not our decision. That's for the authorities to make."
Sources have told ESPN that the FA offered to stage some of the other three matches rearranged from Dublin with Newcastle United's St James' Park ground listed as a possible option.
It is believed the British government were keen on using a stadium based in the north to spread out the experience of staging a tournament across the country but sources claim both Manchester clubs withdrew from the running in a decision unconnected with the Super League collapse.
However, UEFA were concerned about the logistics involved in introducing a new stadium venue so close to the competition -- Turkey play Italy in the first match on June 11 -- and therefore preferred to relocate Dublin's games to St Petersburg in Russia, which was already an existing host city.
The round of 16 game added to Wembley's schedule could potentially feature England vs. Germany in a repeat of the Euro '96 semifinal in London and Bullingham said: "We are delighted to be able to help UEFA in staging the game. They asked us a couple of weeks ago whether we would be able to help out. Both we and the government were very keen to help.
"We also liaised with the Irish FA to check they were comfortable, which they were. From our perspective, it is absolutely fantastic to get another game at Wembley and it is another chance for fans to come and experience the Euros.
"I'd also make the point it is an incredibly tough route to the final for us but this gives us another potential opportunity for a game at home for the Three Lions which obviously is brilliant for us as well."
Bullingham also confirmed the FA are exploring changes to its rulebook to prevent clubs attempting to form a breakaway league in future following Manchester United, Manchester City, Liverpool, Arsenal, Chelsea and Tottenham's collective attempt to join a Super League this week.
"Our primary focus now is working to ensure this can never happen again," he added. "We are exploring all options to prevent that including legislation and changes to our rule back and nothing is off the table."