A method of operating a terminal in a wireless telecommunications system comprising the terminal and a network node, wherein the method comprises: determining there is data to be transmitted from the terminal to the network node using a series of repeat transmissions; establishing an initial arrangement of transmission resources to be used for transmitting respective ones of the repeat transmissions from the terminal to the network node; starting to transmit the series of repeat transmissions to the network node using transmission resources according to the initial arrangement; establishing before the transmission of the series of repeat transmissions to the network node is complete that a modified arrangement of transmission resources should be used for transmitting at least some of the remaining repeat transmissions; and starting to transmit the at least some remaining repeat transmissions to the network node using transmission resources in accordance with the modified arrangement.