Think like a bird.... you want to go south and follow the coast, ideally out of range of things that can eat you. You are only going to go up the Mersey if you have no choice (a mega wind up your backside) or you can't see properly (at night or in dodgy visibility)
New Brighton is best in a monster NW gale or first thing in the morning. How far west you need to go to get action is a function of how strong the birds can fly, how strong the wind is and what the visibility is like. Yesterday I could see Snowdonia and almost Coniston.... it wasn't windy and consequently the birds were cutting the corner missing out Wirral completely - heading from just in sight of land at Formby to presumably just in sight of land off the Great Orme. I could make out birds as dots, out in and past the wind farm. Had it been a little less clear and or a more blowy, the big stuff would be visible from west Wirral. In huge gales the weak flying birds, petrels, Sabs and LT Skuas end up in the Mersey mouth, whilst the majority of the skuas, shearwaters, kittiwakes and gannets are best seen from Hilbre and Hoylake. (Though Bonxies do seem to like the Mersey mouth as a food source)
The wind and squalls woke me up at about 4am and its blowing plenty strong enough to bring birds in... I'd expect stuff to appear after the tide today and continue into tomorrow. If it starts raining, that would be better.