Green’s Dictionary of Slang

tom n.3

[abbr. tommy n.1 (3)]

1. (S.Afr.) a barmaid.

[UK]J.R. Couper Mixed Humanity 8: He held out the inducement of a new ‘tom’ being at this establishment – meaning a new barmaid.

2. (Aus.) a woman [poss. earlier use of sense 3].

[Aus]Sydney Sportsman (Surry Hills, NSW) 11 May 3/6: And he drank with the ladies from foreign parts, ‘Shine Toms,’ he reckoned them — ‘ryebuck tarts!’.

3. a prostitute, esp. one working in Mayfair.

[UK]V. Davis Phenomena in Crime 255: A Tom. Old Prostitute.
[UK]B. Hill Boss of Britain’s Underworld 13: We even had some of the West End toms on our side, ready to phone us.
[SA]J. Yates-Benyon Weak and the Wicked 134: Prostitutes (‘Toms’ to the British police) take up their beats according to the type of services they are prepared to render.
[UK]G.F. Newman You Flash Bastard 40: But complaints like those against DC Bates and DC Eric Humberstone, who was on complaint for what amounted to talking to a couple of old toms in a pub, made Sneed angry.
[UK]S. McConville ‘Prison Language’ in Michaels & Ricks (1980) 526: One might dream of a jump with a chick (girl), tom or brass (prostitute).
[UK]J. Morton Lowspeak.
[UK] (ref. to c.1948) L. Pizzichini Dead Men’s Wages (2003) 104: Mr Miller as he reluctantly called him ordered two ‘toms’ at once.
[UK]D. Seabrook Jack of Jumps (2007) 316: He knew the husband, used the pubs, poked the toms.

In compounds

tom-carding (n.)

the distribution of cards advertising prostitute’s services; thus tom-carder.

[UK]Indep. on Sun. 8 Apr. 9: ‘Tom-carders’, the prostitutes’ agents, who earn £30 for every 100 cards placed in phone boxes [...] Westminster City Council, which is due to sponsor legislation to make ‘tom-carding’ a criminal offence.
tom squad (n.) (also toms patrol)

(UK Und./police) the vice squad, esp. as regards prostitution.

[UK]G.F. Newman Sir, You Bastard 144: Sneed found a couple of DC’s from the current Toms Patrol, which pursued [...] old drippers.
[UK]J. Morton Lowspeak 139: Tom squad – the Vice Squad.