Some of Theo’s achievements include:
- FIA Karting Academy Trophy – Vice Champion 2020
- TVKC Winter Series Champion 2020
- British Vice Champion 2019
- Champion Whilton Mill 2019
- Winter Champion Shenington 2019
- Lap Record at Shenington in MiniX30
- Champion Kartmasters British GP 2018
- Champion TVKC 2018
- Champion Whilton Mill 2018
- Seeded 4th in SuperOne British Championships 2018
- Top Overall Privateer SuperOne British Championships 2018
- Champion Whilton Mill 2017
- Top Rookie SuperOne British Championships 2017
- Top Privateer SuperOne British Championships 2017
- Seeded 7th in SuperOne British Championships 2017
- Vice Champion PFI 2017
- Vice Champion 0 Plate 2017
- Vice Champion E Plate 2017
- Top Privateer Clay SuperOne 2017
- Top Rookie Clay SuperOne 2017
- Top Privateer Whilton Mill Superone 2017
- Lap record at Fulbeck for Honda Cadet
- Vice Champion Bayford Meadows 2016
- 3rd TVKC Championship 2016
- Top Honda Cadet Rookie TVKC 2016
- Shenington Winter Champion 2016