The narrowest point I can find is between the Waterloo Dock and Seacombe Ferry landing stage, which is 820m. Land to land at this point is around 900m.
The widest looks to be around 4.5k, near Ellesmere Port
Measuring Distances in Google Maps
If you want to buy a chart, www.dpm.co.uk - Liverpool is chart 3490.
The widest looks to be around 4.5k, near Ellesmere Port
Measuring Distances in Google Maps
If you want to buy a chart, www.dpm.co.uk - Liverpool is chart 3490.