Green’s Dictionary of Slang

a charabanc, a coach.

1920		Lancs. Eve. Post 2 Dec. 4/3: Chara Disaster [...] Five Skipton young men [...] killed in the Black charabanc disaster.
1924		Hull Dly Mail 12 Aug. 8/3: Chara Fatality [...] Following a chara traip [...] on August bank Holiday a woman was found on the road.
1934		P. Allingham Cheapjack 39: Suddenly a chara drives up.
1934		D.L. Sayers Nine Tailors (1984) 98: I’ve heard as there’s a reglar party comin’ from St. Stephen in Jack Brownlow’s sharrer.
c.1939		B. Bennett ‘The Broadcaster’ [music hall script] I’m a varsity man — you can tell by my voice / All through Oxford I’ve been — on a chara.