Multiple Access Communications Limited (MAC Ltd) was recently engaged by Ofcom to investigate the potential impact of interference from new LTE systems deployed in the 2.3 GHz frequency band on Bluetooth and ZigBee devices operating in the adjacent 2.4 GHz ISM band. MAC Ltd was selected to perform this work after a competitive tender process and it used its extensive expertise in these mobile communications technologies to design and implement appropriate test set-ups to generate the necessary information required by Ofcom to inform its plans for the release of the 2.3 GHz frequency band. The final reports from the Bluetooth and ZigBee interference studies are available on Ofcom’s web site at http://stakeholders.ofcom.org.uk/consultations/pssr-2014/.