Large components and structures’ conditions are difficult to monitor using conventional NDT where the positioning of measurement sensors varies with each test. The alternative is to permanently install sensors so that the data is always collected at exactly the same location. If this is done then small changes in the condition of the structure can be inferred from changes in the captured data over time. Our research in this area has focussed on using guided waves capable of inspecting large areas to deal with the presence of environmental variation and minimise its effects. Ongoing research in the group has also developed a new wireless sensor system that overcomes traditional SHM wired sensors’ glitches like added weight to a structure (often crucial). Recent work has focussed on understanding the impact on a component of embedding the sensors and shown that if designed carefully there is a minimal reduction in structural performance.