The train drivers union ASLEF have rejected the offer discussed with East Midlands Trains over cuts to pension contributions.
ASLEF have confirmed a walk-out will take place during three days of the Olympic Games next month, from the 6th to the 8th of August.
East Midlands Trains says it will aim to provide as many seats as possible for people travelling to the Olympic Games.
Communications have broken down between East Midlands Trains and ASLEF, as the union confirms train-drivers will strike during the Olympics
Train drivers are staging three days of strikes during the Olympics in a row over pensions.