Green’s Dictionary of Slang

1. a car, a tram car.

1930		(con. 1910–20s) D. Mackenzie Hell’s Kitchen 119: La-de-da ... car, motor-car, tram.
1960		J. Franklyn Dict. of Rhy. Sl.
1971		J. Jones Rhy. Cockney Sl.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.

2. a trolley car.

1969

S.T. Kendall Up the Frog 20: There was everythink in it – a Cain ’n’ Abel [...] a la-di-da over on one side wiv all the tumble-dahn the sink you could think of.

3. (also lardy) a cigar.

1977		D. Powis Signs of Crime 191: Lah-di-dah Cigar (sometimes just ‘lardy’).
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.