I don't know if patching would allow this but maybe an hourly service from London to Bidston (Mersyside) and half hourly during the Peak times.It could go from different London stations each time like 1st Euston, 2nd Marylebone, 3rd Paddington, 4th from Euston, 5th from Marylebone and so on.The calling points for the one from Euston could be London Euston, Milton Keynes Central, Northampton, Rugby, Coventry, Birmingham International, Birmingham New Street, Wolverhampton, Telford Central, Wellington?, Shrewsbury, Gobowan, Wrexham General, Shotton and Bidston.
The one from dromedary Marylebone could go the same route as the old Wrexham and Shropshire trains to Wrexham before diverging to Bidston. The calling points of this could be Banbury, Leamington Spa, Coventry, Birmingham International, Tame Bridge Parkway, Wolverhampton, Telford Central, Shrewsbury, Gobowan, Wrexham General, Shotton and Bidston.
The one from Paddington could call at Paddington, Reading, Oxford, Banbury, Leamington Spa, Birmingham New Street, Wolverhampton, Telford Central, Wellington?, Shrewsbury, Gobowan, Wrexham General, Shotton and Bidston.