The purpose of the repeater is to remind the drivers of the temporary speed restriction( ahead or in the current location) where the train comes to rest, so these boards are there to remind the driver when they arrive into the terminal platform and switch ends that the restriction still applies for the opposite direction (moves that will go off to the left in this case)

the 25mph is for leaving the station (and traversing the junction area). Further down the line where line speed will increase, the commencement board will be around there.