A single archaeological trial-trench was excavated on a diagonal axis within the footprint of the proposed extension. All work was carried out in accordance with the Brief and WSI. The site is located to the rear of no 63-65 on the northern side of the High Street in the Brentwood High Street Conservation Area. A single archaeological trial-trench was excavated on a diagonal axis within the footprint of the proposed extension. The trench was 7.5 m long and 1.6 m wide, and it was excavated under archaeological supervision using a tracked excavator equipped with a toothless ditching bucket. The trench was excavated to a depth of 500 mm below modern ground-level. Three layers were encountered. Three features were noted at the east end of the trench; two modern pits (F1, F2) and a post-med/modern brick structure (F3). Residual Roman finds were recovered.