Ton went into the fixture missing Gary Clarke, Joe Fisher and Charlie Owen, the latter out injured - with Calvin Sedenu coming in for his debut at centre-half, and Craig Calvert returning to the starting eleven.
Early strikes from Calvert - scoring against his former club - and George Latham, had put Ton in a relatively comfortable position going into the interval.
However Lydd fought back well in the second half in being more assertive in the Ton final third, and drew parity through first Reece Mortimer and then Ryan Norman - capitalising on defensive lapses and punishing Ton when temporarily reduced to ten through Adam Phillips second sin bin in successive games.
Sam Conlon put Ton back into the ascendancy with nine minutes remaining with a diagonal shot across 'keeper Charlie Wealands, from Tom Scorer's third assist of the evening.
While the visitors thought they'd done enough, Lydd weren't to be denied, with Smith bringing frenzied celebrations at the death from the home crowd, in seeing his shot crashing in off the underside of the bar.
TON: Barnes, Stow, Greenfield, Phillips, Sedenu, Penfold, Brown, Scorer, Latham, Conlon, Calvert. Subs: Hughes, Haylock-Ashdown (for Latham '81), Philpott (for Conlon '81), Tomsett (for Greenfield '46), Goddard.
* Kennington are without a fixture for the second Saturday running, however a last-minute friendly has been organised by boss Dan Scorer on Friday evening (tomorrow), at Homelands against Ashford United Under 23's, 7.45pm k.o, prior to the visit of Snodland Town to Homelands in SCEFL Division One, next Wednesday, October 9 (also 7.45pm k.o).
These fixtures are prior to the club's FA Vase first round tie against Crowborough Athletic - also at Homelands - on Sunday, October 13, 3pm k.o. More news on this game to follow...
Main article photo: Harry Stow prepares to cross at Lydd Town on Wednesday evening.