Some of the fares on this thread are wrong.
Frodsham - Liverpool is £7.10 / £5.40 off-peak (both day returns)
Chester - Liverpool is £8.80 / £8.10 off-peak route Warrington, £8.90/£8.50 route Any Permitted, £6.20/£4.40 route Birkenhead....
Indeed, it appears as though I was too hasty in posting and got things wrong, that teach me for trying to be quick! The fare I quoted before is infact the Runcorn to Liverpool fare, apologises for any inconvenience caused.
The FRPP (Fares and Retail Publication Portal) states that the £4.40 return fare from Chester is 'Route Birkenhead'
not 'Any Permitted' (I hadn't checked this previously, which I should have). The 'Any Permitted' fare from Chester is £8.90 Anytime day return or £8.50 Off-peak day return. The 'Route Warrington' fare is £8.80 Anytime day return or £8.10 Off-peak day return. Both these fares are set by Arriva Trains Wales.
So, the Chester to Liverpool fares listed as 'Route Warrington' and 'Any Permitted' (because the 'Route Warrington' fare is cheaper) are valid for travel via Warrington. However the Frodsham to Liverpool 'Any Permitted' fare is not valid via Warrington.
Which basically means, if you are going from Frodsham to Liverpool via Warrington, you are best off with a Chester to Liverpool 'Route Warrington' fare (£8.80/£8.10), if you are going via Hooton, you are best off with the Frodsham to Liverpool fare (£7.10/£5.40).
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I'm thoroughly confused - the Liverpool-Chester and Chester-Liverpool fares are different! My Avantix Traveller gives £8.50 CDR Chester-Liverpool route Any Permitted, yet Liverpool-Chester £4.40 CDR route Any Permitted! Yet the online journey planners still offer £4.40 fares for the latter journey. Can anyone explain?
Chester - Liverpool 'Any Permitted' set by Arriva Trains Wales
Liverpool - Chester 'Any Permitted' set by Merseyrail
Can't say why its like that, it just is. Don't know why the journey planners are having problems though, possibly the programmer/data entry people assuming all fares are the same in opposite directions.