1. A method of generating a set of motion vector predictors for a block to decode forming part of a current video frame that is to be decoded, wherein the number of temporal motion vector predictors in the set is one and the number of spatial motion vector predictors in the set is at least one, the method comprising determining the one temporal motion vector predictor of the set by selecting as the one temporal motion vector predictor, the motion vector at a predetermined position in a neighboring block of a reference frame neighboring a block of the reference frame collocated with said block to decode, the neighboring block being diagonally below and to the right of the block of the reference frame collocated with said block to decode, and the predetermined position being a top left position in that neighboring block.