During the consultation on 'Shaping a Healthier Future' which proposed closure of several A&E services, including Central Middlesex, I repeatedly raised the issue of whether what remained could cope with a 'major incident' in Brent which includes the Park Royal Industrial Estate,  several railway lines, the North Circular, Wembley Arena and Wembley Stadium all potential accident or attack sites.
On event days at Wembley roads in the area are very congested, particularly for the recently increased full capacity events, making acess for emergency vehicles extremely difficult. 
The events in Manchester make this question even more relevant. I understand there is a special committee that keeps security in Wembley under constant review although its proceedings are not made public.
It appears that we may see armed police patrolling in Wembley this long weekend of Stadium events.
Meanwhile the Stadium has issued the following guidance to fans:
MESSAGE FOR FANS COMING TO WEMBLEY STADIUM
The safety of fans
 is of paramount importance and we have robust security measures in 
place at Wembley Stadium connected by EE. In collaboration with the 
Metropolitan Police and the local authorities there will be an enhanced 
security operation for all upcoming events. 
All supporters 
attending the upcoming matches at Wembley Stadium are advised to arrive 
as early as possible to avoid queues and to support commemorations of 
the tragic events in Manchester this week.
Fans can be 
assured that all appropriate security measures are in place for the 
upcoming matches, which includes thorough searches upon entrance to 
Wembley Stadium, and they are encouraged to arrive as early as possible 
to avoid any delays in entering the stadium.  We strongly advise that 
all supporters arrive at the stadium no later than 1 hour prior kick-off
 to be inside for the start of the match and we encourage spectators to 
not bring any bags or unnecessary items with them.
The FA plans to appropriately remember Monday’s Manchester attack before the kick-off of the Emirates FA Cup Final including: 
- A period of silence will be observed prior to kick-off
- Commemorative wreaths will be laid by The President of the 
Football Association, his Royal Highness the Duke of Cambridge and The 
Football Association Chairman, Greg Clarke
- Arsenal and Chelsea players will wear black armbands as well as the match officials
In addition, all 
four teams and match officials taking part in the Sky Bet Play-Off 
Finals on Sunday and Monday will wear black armbands and observe a 
period of silence prior to kick-off.
On Tuesday night 
The FA lit the Wembley Arch in England colours to remember the victims 
and to show support for all those affected by the attack, as well as 
displaying ‘For Manchester’ on the front of the stadium.
The Emirates FA 
Cup Final matchday programme was printed prior to this weekend’s 
matches, so there is no reference to Monday night’s tragic events due to
 print deadline. The FA will instead be showing its support with the 
plans listed above.
We thank all supporters for their cooperation and understanding.
Saturday 27 May 
Emirates FA Cup Final: Arsenal v Chelsea
17:30 kick-off
Sunday 28 May 
Sky Bet League Two Play-Off Final: Blackpool v Exeter City
15:00 kick-off
Monday 29 May
Sky Bet Championship Play-Off Final: Huddersfield Town v Reading
15:00 kick-off