Retailers Liberty, French Connection and Selfridges closed their stores on Friday following the death of the Queen.
The UK has now entered a period of national mourning following the death of Her Majesty The Queen on September 8.
According to a statement from Buckingham Palace, the Queen died peacefully at Balmoral Castle in Scotland.
Historic London department store Liberty was among the first to confirm it will not open on Friday.
The Soho-based retailer said: "Our heartfelt sympathy and thoughts are with the royal family at this sad time.
"As a mark of respect, the Liberty store will be closed until Saturday September 10 at 10am while we join the country in mourning."
French Connection, which runs 26 shops across the UK, said it will not trade on Friday.
"Following the sad news of the passing of Queen Elizabeth II, we will close the doors of all our French Connection stores on Friday September 9," it said.
"Our thoughts are with the royal family at this time."
On Thursday evening, Selfridges said it would remain closed all day on Friday before reopening at the weekend.
"It is with deep sorrow that we acknowledge the passing of Her Majesty, Queen Elizabeth II," it said.
"Queen Elizabeth has been a reassuring constant throughout our lives, ascending to the throne on February 6, 1952, making her the longest-reigning monarch in British history.
"Over the past 70 years, her Majesty has been dedicated to the service of our country and the Commonwealth, demonstrating an enormous sense of duty and commitment."
Today, all bank and building society branches appear to be open, including Lloyds, NatWest, HSBC, Barclays, Santander and Nationwide.
Most shops and supermarkets are open too.
Supermarkets have been posting tributes to Her Majesty online and have changed the colour of their social media logos to black as a mark of respect.
On the day of the Queen's funeral, there will likely be a bank holiday and most places are expected change their operating hours or close altogether.
The funeral is likely to take place on Monday, September 19 - but a date has not yet been officially confirmed.
Official Government guidance said: "There is no obligation on organisations to suspend business during the National Mourning period.
"Depending on the nature and location of their business and the tone of planned events, some businesses may wish to consider closing or postponing events, especially on the day of the State Funeral, however this is at the discretion of individual businesses."
Harrods is among the businesses to have confirmed it will close its doors on the day of the Queen's funeral.
