We present recent progress on the development of a newfully nonlinear potential flow (FNPF) model for estimation ofnonlinear wave-body interactions based on a stabilised unstructuredspectral element method (SEM). We introduce new proofof-concepts for forced nonlinear wave-body interaction in twospatial dimensions to establish the methodology in the SEM settingutilising dynamically adapted unstructured meshes. The numericalmethod behind the proposed methodology is describedin some detail and numerical experiments on the forced motionof (i) surface piercing and (ii) submerged bodies are presented.