Crisp

Crisps, known as chips in the United States, (TV: Dead of Night) were, according to the Eighth Doctor, a "highly salted" and "processed" potato snack. Typically, they came in packets. The Doctor once used a packet of crisps to feed the Nukaryote, and thereby escaped being absorbed by it. (COMIC: Doctor Who and the Nightmare Game)

The Krillitanes used Brainy Crisps to increase the intelligence of children. (PROSE: Code of the Krillitanes)

When Susan Foreman, John Brent and Gillian Roberts broke into the Coal Hill tuck shop, all they had was cold Cadbury's chocolate, Smith's crisps and Tizer. (PROSE: Time and Relative)

While they were on the run during Miracle Day, Gwen Cooper went to a petrol station to buy food, but all they had was crisps. (TV: Dead of Night)

The Tenth Doctor ate some smoky bacon flavoured crisps he received from Barbara while imprisoned in Dreamhome, but found that they were soggy. (PROSE: Sick Building)

Later, when the Eleventh Doctor first met twelve-year-old Kazran Sardick, he initially suggested that they should spend Christmas Eve "eat[ing] crisps and talk[ing] about girls". (TV: A Christmas Carol)

Clara Oswald liked crisps. (TV: Into the Dalek)

The Twelfth Doctor was eating a bag of crisps when supervising 's adventure with Bill Potts and Nardole; he sheepishly denied it when the sound was heard over their communication system. (TV: World Enough and Time)

Jack Harkness described bread sticks as "crisps for people who [were] scared of crisps." (AUDIO: Driving Miss Wells)

Behind the scenes
Although unremarked in TV: Rose, McCoy's was a brand of crisps in the United Kingdom.