Th-fronting

[6] In his 1892 book A Grammar of the Dialect of Windhill, Joseph Wright noted variable th-fronting in his district in words such as think, third and smithy.

[10] Comparing his studies over time in Norwich, Peter Trudgill concluded that th-fronting had been completely absent in 1968 and then very common amongst younger people by 1983.

[14] In popular music, the singer Joe Brown's 1960s backing band was christened The Bruvvers (that is, "the brothers" with th-fronting).

[15] Up until the late 20th century, th-fronting was common in speakers of Australian English from North Brisbane and the Sunshine Coast of Queensland.

This may stem from the relatively high number of London cockneys who settled there during the Queensland gold rushes of the 19th century.

The following is a sample of a speaker of the Cockney accent who has th-fronting (affected words are in bold): My dad came from Wapping and me mum came from Poplar.

Th-fronting in the speech of working-class adolescents in Glasgow was reported in 1998, provoking public as well as academic interest.