GSV no good here, as it's out-of-date, (Oct 2022). Di you turn left or right into Perrin Road. Are there any advance signs ? If not you might have an appeal argument. However, your photo shows three signs, one positioned for drivers turning left into the road. If you turned right, the signs would be clearly visible to you.
Anyway, post up the video. Did you just carry on up Perrin Road or turn round ?