Special October Extra 10% Discount Derby Hotels. Book your stay at Derby hotels London, Paris or Madrid and get additional 10% discount. Promo code valid for 1 October to 31 October 2016 stay period. Offer valid for: The Caesar 4* London. Banke 5* Paris. Villa Real 5* Madrid. Urban 5*GL Madrid. Terms & Conditions: Offer valid until 31 October 2016. Stay period is from 1 October 2016 to 31 October 2016