Area D has a double arrow which brackets from the Tranmere Oil Terminal area and along to the cattle run at the Lairage. Seacombe is much further down river. I reckon anyway.
Yeh - Area D - looks like one arrow pointing to Woodside Lairage and one pointing to Wallasey Lairage which was between Wallasey and the Alfred Dock - where the entrance is today.
Seacombe Landing Stage is further up river - past the Flak notice - jutting out into river...
