e-MERLIN is an upgrade to the MERLIN array of seven radio telescopes spread across England, which will increase its sensitivity by more than a factor or 30. The combination of μJy sensitivity with the 50-mas resolution already provided by the long baselines of MERLIN, will open new avenues of research for e-MERLIN. The huge increase in bandwidth is achieved by replacing the exiting microwave links with new optical fibre connections. To collect and correlate this wide bandwidth, new receivers, IF and sampling equipment, digital and optical transmission equipment and a new wideband correlator are being designed and constructed. This paper summarises the design goals, scientific objectives and implementation of e-MERLIN.
AVO Work Area 2 consists of deployment and demonstration of an interoperability prototype. Access to archives of all the partners (ESO, ESA, AstroGrid, Terapix, Jodrell Bank) is implemented via the CDS data federation and integration tools: VizieR and Aladin. The prototype is available for science usage and more functionalities, based in particular on the usage of Uniform Content Descriptors (UCDs) for data mining, will be developed. Case by case discussion with data providers will help to establish a set of practical recommendations for interoperability. Science requirements and new technologies studied by the other AVO work Areas will also be tested. Discussions on standards are ongoing among all VO projects.