Whately Hall Hotel, Banbury Cross, Banbury, Oxfordshire (01295 253 261; www.mercure.com) has doubles rooms costing £155 during the festival, including breakfast; otherwise doubles start at £110 including breakfast. Mercure Warwickshire Walton Hall Hotel & Spa Mid-scale hotel for business trips or leisure. This hotel has 149 standard bedrooms and 11 apartments of a contemporary. Mercure Warwickshire Walton Hall Hotel & Spa Mid-scale hotel for business trips or leisure. This hotel…