Meanwhile, heat a griddle pan over a high heat, lightly brush the corn cobs with oil and season. Cook the cobs for 8-10 minutes, using tongs to turn them until really charred. Put onto a chopping board and allow to cool slightly. Turn a cob up on its end, then use a large sharp knife to carefully remove the kernels in a downward movement. Turn and repeat until all the kernels have been removed, then repeat with the other cob.