At one time, Wallasey was an island, cut off by the Wallasey Pool, only accessable by a bridge. I think a while ago, they found sunken remains of the old Roman bridge to wallasey!
When the workers were digging out the Wallasey Pool in about 1850 to construct the dock they came across remains of an oak timbered bridge. It would of spanned some 100 feet in length and rested on rocks on either side.