The National Strategy to Reduce Gambling Harms has identified the need to make significant progress towards truly national treatment and support options as one of its priority actions. This priority area is shared by GambleAware, another key stakeholder in the Great Britain's (GB) gambling treatment and support landscape. The evidence upon which GB's current gambling treatment strategy is based is outdated, and GambleAware has begun the planning process towards an update to the current treatment strategy. A rapid evidence review was commissioned to provide an updated evidence base on treatment and support for problem gambling in order to inform future growth, improvement, and evaluation of problem gambling treatment services across GB. The report covers ten key treatment topics including: