McDonald's was a fast food restaurant. They served Big Macs. (PROSE: Face-Painter)
In the 1980s, Ace worked in a McDonald's restaurant on Tottenham Court Road as a waitress. (PROSE: Head Games, Illegal Alien, Matrix) At one point she kicked out Tegan Jovanka and Diva for not ordering anything. (PROSE: The Crystal Bucephalus)
In 1994, Ben Jackson and Polly Wright ordered two hamburgers, fries and a Coke from a McDonald's in Cumbria. Neither had heard of the restaurant, as it was after their native time of 1966. Ben thought the food tasted awful. (PROSE: Invasion of the Cat-People)
One McDonald's restaurant in Kent was petrol-bombed by a kids gang known as the Witchkids. Details of the incident were suppressed under the Official Secrets Act. (PROSE: Cat's Cradle: Warhead)
In 2005, McDonald's had an advertisement at Piccadilly Circus in London. (TV: Rose)
In 2009, Ianto Jones offered to take his niece, Mica Davies, to McDonald's since he missed her birthday. (TV: Children of Earth: Day One)
McDonald's Happy Meals were still made in the 2020s. (AUDIO: The Word Lord)
Ace and Hex hoped to find a McDonald's when the TARDIS landed in what was apparently London. (PROSE: Six Impossible Things Before Breakfast)
An advertisement for McDonald's was still seen in London as late as 2254, when the Doctor liberated the city from Dalek occupation. (GAME: Dalek Attack)
Behind the scenes
The American fast food chain arrived in the United Kingdom in 1974, thirty-four years after its emergence in its home nation, and eight years after Ben and Polly's time.
In 2017, Richard Franklin starred in a commercial advertising the McDonald's Monopoly promotion, and in 2019, Vitas Varnas starred in an ad for McDonald's Australia advertising the All Day Menu.