Jonathan: Exceptional high tides right now – a combination of spring tides, low atmospheric pressue and an unrelenting wind from the south east. Our own beach this morning was reduced to a narrow sliver of sand at the foot of the dunes, the high-point marked by a line of bladder-wrack.  Over in Eriskay, a small prominotory was within an inch or so of becoming an island – a narrow neck of land with sea-water between the blades of grass.