West Ham are starting their Europa Conference League campaign against Romanian side FCSB at the London Stadium, while United are in Europa League action against Real Sociedad at Old Trafford, where flags will be flown at half-mast.
Standard Sport understands there were discussions between West Ham, Uefa and the Football Association over postponing, but due to safety concerns it was decided the game would go ahead. Players from across both matches, and both sides, will wear black armbands.
The minute’s silence at the London Stadium turned into several minutes of applause, with the away fans from Romania joining in, along with an impromtu rendition of ‘God Save The Queen’.
The passing of Britain’s longest reigning monarch at the age of 96 was confirmed by Buckingham Palace at 6:30pm BST.
Arsenal’s Europa League match away at Swiss side FC Zurich had already kicked off at 5:45pm and a minute’s silence was held ahead of the start of the second half, only minutes after the Palace’s announcement.
A West Ham statement said the club was “deeply saddened by the passing of Her Majesty Queen Elizabeth II”.
It added: “The Queen reigned for over 70 years, guiding the United Kingdom and the Commonwealth through seven decades, leading by example and serving as an inspiration to us all throughout her long life of public service.”
“Manchester United shares the sorrow of the entire nation following the announcement from Buckingham Palace on the passing of Her Majesty, The Queen,” the club said in its own statement.
“The club recognises her immense contribution to public life, including sport, both here in the United Kingdom, across the Commonwealth, and around the world.
“Everyone connected with Manchester United joins the wider football family in sending our deepest condolences and heartfelt sympathy to The Royal Family.”