In 1996, he made the switch to the British Formula 3, driving for Fortec Motorsport and winning his first race in the series,[7] eventually finishing sixth overall.

[1] He also made his debut in the FIA GT Championship, driving for the Cirtek Motorsport team in their GT2-class Saleen Mustang at the Spa 4 Hours, finishing 25th overall and 13th in class.

[8] In 1998 he moved to America to contest the Indy Lights series, driving for Johansson Motorsports, where he finished third in the Championship and was crowned 'Rookie of the Year'[9] after taking two victories.

[1] In 2000, Smith made the switch to the American Le Mans Series, entering ten events for Johansson-Matthews Racing in LMP1,[10] finishing fifteenth in class.

[28] Towards the end of the year, Smith drove a Peugeot 206 XS rally car at a test session, held by ProSpeed Motorsport at the RallyDrive School in Lincolnshire.

[31] However, that year Smith made his Champ Car World Series debut, during the second half of the season, driving for Paul Gentilozzi's Rocketsports team.

[36] His other entry that year came as part of the Le Mans Endurance Series, where he finished second in the LMP2 class for Chamberlain Synergy Motor, driving a Lola B05/40 AER at the 1000km of Istanbul.

[37] Smith opened up his 2006 season with a 14th place overall (10th in class) at the Daytona 24 Hours, driving for Howard - Boss Motorsports in its Crawford DP03 Pontiac.

[1] For the first time in four years, Smith returned to Le Mans, driving the Quifel ASM Team's Lola B05/40 AER, alongside Miguel Amaral and Olivier Pla.

[50] He made his first appearance in the Le Mans Series, and a LMP1-spec car, for several years at the 1000 km of Spa, driving the Team LNT-entered Ginetta-Zytek GZ09S, and finishing sixteenth overall, eleventh in class.

[53] It was announced on 15 February 2010 that Smith would be competing in the 2010 24 Hours of Le Mans with the Rebellion Racing Team driving a Lola B10/60 in the LMP1 class.

For 2012, Smith continued with Dyson Racing, now driving a new Lola B12/60 Mazda to defend his ALMS title, but came up 9 points short, finishing in second place.

[61] Although initially signed up to drive for Dyson in its first ever 24 Hours of Le Mans race,[citation needed] the team withdrew from the event due to financial reasons, and Smith did not compete.

[69] In 2015 the trio returned to the series, once again coming second in the championship standings, while he also raced in the Bathurst 12 Hours, crossing the line in fourth position.

[73] The same year, he was interviewed about his work for Greenlight Sports by his brother Dom Smith, for the mental health awareness platform, Wobbling About And Rocking Out (waro.co.uk).

(key) (Races in bold indicate pole position; results in italics indicate fastest lap) † Points only counted towards the Michelin Endurance Cup, and not the overall LMP2 Championship.