Photocatalysis has evolved over the last 15 years to be a popular and effective methodology of organic synthesis, enabling the formation of compounds that would otherwise be inaccessible using traditional thermal synthesis. Moreover, photocatalysis is arguably a "greener" route of synthesis compared to other methods as conditions are generally less harsh (ambient temperature and pressure) and often avoids the use of toxic stoichiometric oxidants and/or reductants, in favour of catalytic amounts of the electron transfer agent, the photocatalyst (PC).