Early years and Primary school

David was diagnosed with cerebral palsy at one year of age, and went to a developmental centre in Winchester for disabled children. Aged three, he went to Cedar School, Southampton for special needs children. David first played Boccia aged six at Cedar School when the school competed at National junior games in Stoke Mandeville. Throwing sideways, David never really won a game and the sport took time to ignite his interest. The school really struggled to challenge David and his potential to learn was being held back by the lack of academic ability of his peers.

Secondary school

After a long battle with the council, David's parents managed to get David a place at Treloar School. Aged eleven, David finally changed schools and went to Treloar School in September 2000. Immediately David began to flourish, his confidence grew rapidly and he really developed his talent for Boccia, drumming, wheelchair hockey, wheelchair football and Para-athletics. He became the youngest ever player to win the British Boccia Championships at the age of fourteen and won numerous national titles in the other sports. David was elected head boy in 2004 and managed the wheelchair hockey and football sessions.

College

The move to college was straight forward for David as it was the same organisation. Whilst at Treloar College, David attended Alton College to complete his A'levels in Physics and Maths. The demands of his, now international, Boccia career meant that a lot of the hobbies he had at school had to be phased out.

University

After the Beijing Paralympics, David went to Swansea University to study Aerospace Engineering. Due to Boccia, David took six years to complete his degree. However, David was able to set up a permanent base in Swansea with the sports support services and facilities necessary to remain successful.

Early career

Smith joined the England and Wales squad in 2004 soon after his first British title. His international debut followed the same year. Smithwent to the European Championships in 2005, his first Major ranking international. There he beat the world ranked number 6 player 6–0 in a pool game and got all the way to the quarter-finals. In the team event, he helped the England team secure a silver medal. Smith had a disappointing second major in 2006 this time representing GB, where he finished 13th and the team got a bronze at the World Championships in Rio. In 2007, Smith became double world champion at the age of 18. Smith competed in Beijing in 2008 but only managed 13th individually. The team did much better and inspired by his teammate Nigel, Smith raised his game and helped the team achieve a historic Paralympic Gold.

Middle career

After Beijing, David built up a friendship with Sarah Nolan who in 2010 became his coach. New management in the GB squad helped David untie the bad practices of the previous era and slowly the sport became professional. In 2009, David won his first Europeans to become a world-ranked number 1 for the first time. In 2010, David and the team lost in the quarter-finals to Tadtong of Thailand at the World Championships. Drastic changes were needed and Sarah started reworking how David played the game to suit the new style of play from Asia. In 2011, Sarah became David's permanent on-court assistant. In 2012, David won two medals at the Paralympics for the first time.

In 2013, Claire Morrison became David's coach whilst Sarah remained his on-court assistant. David took over as captain of the team from Nigel and won double gold at the Europeans that year.

In 2014, David became world champion for a second time winning the final spectacularly 8–2.

In 2015, David captained the team to another European Gold and the team gained an automatic slot for the Rio Paralympics.

In 2016, David claimed bronze at the World Individual Championships in Beijing having lost once in the pool stages and losing again to Tadtong.

In Rio, David recovered from the disappointment of Team failure and the loss of a must-win Pool game to beat his long term Thailand rival for the first time. After 8 years, David became an Individual Paralympic champion.

Late career

Glynn Tromans took over coaching after Rio and David won the European championships for the third time and went through the whole 2017 season undefeated. In 2018, David reclaimed his World title at the World Championships in Liverpool completing the "Triple crown" by being reigning Paralympic, European and World champion. In 2019, David defended his European title automatically qualifying for Tokyo in the process.

Restart

David's first competitive competition was the Paralympics in Tokyo. After, suffering a few technical issues in the pool, David found his top form for the Quarters, Semis and Final matches. David played live on C4 for the first time in front of millions of people to win the Gold and defend his title. At the end of the year, David won his 7th European title in Seville.

Domestic Boccia

David has remained unbeaten at the annual English Nationals and GB Championships since 2004 clocking up a record 16 British and 11 National titles. In 2016, David retired from the English nationals to focus on his international career.