The 'normal' Crosville bus from Liscard was the F34, which went down to Leasowe along Reeds Lane,(where I used to get it on a Saturday to go to my nan's house) thru Moreton and Hoylake to West Kirby .... then as a modern day 437, thru Frankby, Greasby and Upton to Park Station, Crosville buses were not allowed further into Birkenhead via Park Rd, until all the services were recast in April 1979.
I used to like Crosville and still do, my Grandad worked there and I did in later life, so I was very proud especially my mum was as I stopped to pick her up in a Crossy double deck bus when I was 20 .. the youngest driver they had!
Just found the answers to the F services
F8 Birkenhead - Hollywell
F9 Birkenhead - Ruthin - Denbigh
F10 Birkenhead - Loggerheads
F11 Birkenhead - Pantymwyn