2. SRETP following NACRT and prior to cancer surgery will provide psychological health benefits and improve patient's HRQL (assessed by semi-structured interviews and questionnaires -EORTC QLQ-30 and EQ-5D). This will provide vital exploratory information that will inform a future application to deliver a larger appropriately powered RCT exploring the hypothesis that patients with greater pre-operative fitness will encounter lower postoperative morbidity and mortality. Specifically, these exploratory outcomes are: