Technika is Tesco's own brand name, which is applied to products sourced from multiple manufacturers, so there's little consistency in their remote codes. However the Tesco Tech Support people should be able to find the correct code for your TV. Phone them (free of charge from a BT landline) on 0800 323 4060 between 0900 and 2000 Mon to Sat (or between 1000 and 1800 Sun).