An ongoing service offering longer-term access and support to synchrotron X-ray services and the expertise of scientists and engineers at the European Synchrotron Radiation Facility (ESRF) targeting all EIC beneficiaries. The service aims to build tailored support and exploitation of synchrotron X-ray techniques for EIC beneficiaries who need longer-term support for their R&D needs. The ESRF has experimental hutches that allow for tailor-made experiments in controlled environments, mimicking real-life conditions. These experiments can be performed in situ, while the reaction is taking place, providing real-time data on the reaction mechanism and kinetics. Custom-designed sample environments can also be used, such as high-temperature furnaces or electrochemical cells, allowing for more precise control over experimental conditions. These experimental hutches offer EIC beneficiaries the opportunity to perform precise experiments, leading to accurate and detailed characterisation of materials and samples. The service targets a range of sectors including health, energy, environment, engineering, and manufacturing. For example, X-ray techniques can aid drug discovery, drug development, and drug delivery systems in the health sector. In the energy sector, complementary X-ray scattering and imaging techniques can enable the imaging of batteries under real working conditions and in multiple dimensions, revealing the internal functioning and failure mechanisms at ultra-high spatial and temporal resolution. In the environment sector, synchrotron X-ray techniques can allow for the identification of trace elements, a better understanding of hydrogen generation systems, and the tracking of pollutants that end up in the environment. In the engineering and manufacturing sector, X-ray techniques can help assess the capabilities and limitations of materials under different conditions, conduct stress tests on materials, and characterise fuel cells and engineering manufacturing processes in real-time and real working conditions. The duration of the service varies, with a few hours per cycle or several days of access based on the complexity of the service requirement.