The aims of this workshop are to discuss the observational results that provide the current Hubble tension, the issues associated with these methods and possible solutions (Day 1), the theoretical developments related to the Hubble constant (e.g. modified theories of gravity, Day 2) before discussion the future of the topic and convening in a final, Grand Panel on Day 3 to debate the issues (both observational and theoretical) and try to establish which avenues of exploration may prove the most fruitful.