you can't get below Liverpools's airspace over the wirral .
They are normally quite accomodating with people landing on the wirral.
Personally i would suggest talking to Hawarden first for an overhead transit of their zone and then to Liverpool for a zone entry at Neston (across the silted up Dee estuary or skirt the edge of the peninsula) at or below 1500ft
Liverpool zone entry exit points over the wirral are neston and west kirby, IMHO i think Neston would suit you better and well away from an retsricted areas
Chester
just re-read your post
the wirral is controlled airspace you will not get a basic service there only when you leave the zone