Some good savings are to be had on popular journeys:
Barrow-in-Furness to Lancaster SDR £14, new CDR £11.90
Whitehaven to Carlisle SDR £11.90, new CDR £9.70
Workington to Barrow-in-Furness (via Sellafield) SDR £13.50, new CDR £11.40
Barow-in-Furness to Carlisle (via Sellafield) SDR £19.00, new CDR £16.10
I note that some flows to Preston are also having their Anytime Return changed to an Anytime Short Return.
The Esk Valley Line is included. Whitby to Middlesbrough SDR was pretty cheap at £8.30 but there will be a new CDR at £7. I bought a Whitby to Kildale return Sunday last, this will go down from £8.10 to £6.80. Drat haha. I am impressed.
The furthest distance I have found is Whitby to Prudhoe (via Hartlepool) goes from £19.20 SDR to £16.30 CDR.
My conclusion here is that they have taken flows where there was an SDR and added a CDR at approximately a 15-16% discount.
Any other areas of the country where they are introducing new fares, or just Cumbrian Coast and Teeside? Any new Advance tickets?
Edit: I have answered my own question. Alnmouth to Newcastle Anytime Day Return £12.90. There is a new Off-Peak Day Return being added at £10.90. I wonder if Virgin Trains East Coast (7 trains a day) and CrossCountry (8 trains a day) approve? Northern only operate 2. At least they have gone to the trouble of introducing an Alnmouth to Chathill CDR
A few that will please certain forum members (I'm looking at you, Yorksrob):
Leeds to Carlisle (Via Appleby) SDR £34.60, new CDR £29.40
Leeds to Lancaster (Via Skipton) SDR £24.40, new CDR £20.70
Preston to Blackpool North SDR £8.70 new CDR £7.30
Preston to Blackpool South SDR £8.00 new CDR £6.80
Where the Anytime Day Single would have cost more than the new CDR, so with Preston to Blackpool South the SDS was £7.20, an Off-Peak Day Single has been introduced at 10p less, so in this case there is a CDS for £6.70. I haven't checked all the singles though, so if someone knows if they have done it only where the SDS would cost more I would be very interested.
So have Northern just done this for all flows where there was an SDR but no CDR?