Green’s Dictionary of Slang

sausage roll n.

[rhy. sl.]

1. the dole.

[UK]Partridge DSUE (8th edn) 1013/2: since ca. 1925.
[Aus]Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Sausage roll. Rhyming slang for dole, ie welfare payments.
[UK]R. Puxley Cockney Rabbit.

2. a Pole.

[UK]J. Gosling Ghost Squad 25: Thieves’ argot, spoken properly, is a foreign language which needs to be learned [...] Among the words and phrases derived from rhyming slang are: [...] A ‘sausage’ is a Pole (sausage roll).
[UK]Dodson & Saczek Dict. of Cockney Rhy. Sl.
[UK]Partridge DSUE (8th edn) 1013/2: prob. since 1939.

3. (Aus.) a goal.

[Aus]Pete’s Aussie Sl. Home Page 🌐 sausage roll: a goal, VFL football, e.g. ‘Kicked a sausage’.

4. see sausage n. (3)