The M5 to Jordanstown passes along a causeway before Whiteabbey, there is a lagoon on the left, which appears to be tidal. Often you see someone out digging on the mud flats, this morning there were 6 people digging furiously in the flats. I wonder what they are after, it must be something pretty lucrative, the only thing I can think of is bait for sea fishing, perhaps lugworms or ragworms.