The advances are good, but tie you to specfic trains, not good in the event of emergency or change of plan.
Take advantage of the londonmidland 50 % sale, which ends on the 4th sept so your just in to get discount
londonmidland.com website
Marston Green - Abergavenny Route Worcester
£12.40 Off Peak Return (50% off as LM price this fare usally £24.80, also don't think that your ticket expires on 4th Sept when the sale ends as it doesn't you have one calender month to complete the journey back)
Abergavenny - Carmarthen Any Permitted
£32.90 Off Peak Return
total cost : £45.30
Journey Times for The Route via Worcester
3rd Sept Outward :
1008 Marston Green - Birmingham New Street 1016
1049 Birmingham New Street - Hereford 1219 (this train stops at Worcester)
1300 Hereford - Carmarthen 1546 (this train stops at Abergavenny so works for the ticket split)
7th Sept Return :
1104 Carmarthen - Hereford 1353 (stops at Abergavenny)
1440 Hereford - Birmingham New Street 1613
1613 Birmingham - Marston Green 1641
Now if you want to travel via the Faster Route of Cheltenham Spa, and then via Lydney as you specify avoiding the Severn Tunnel. This will help :
Again using the londonmidland.com 50% sale buy a :
Marston Green - Abergavenny Route Any Permitted
Off Peak Return £19.35 (again this fare is priced by LM so qualifies for the 50% Sale) This ticket allows you to use this via Cheltenham and Stop Short at Newport South Wales.
Newport (South Wales)- Carmarthen Route Any Permitted
Off Peak Return £26.80
Total cost £46.15
Journey Times via Cheltenham Spa avoiding Severn Tunnel.
3rd Sept Outward :
1008 Marston Green - Birmingham New Street 1016
1030 Birmingham New Street - Newport (South Wales) 1208
1244 Newport (South Wales) - Carmarthen 1456
7th Sept Return :
1104 Carmarthen - Newport (South Wales) 1302
1328 Newport (South Wales) - Cheltenham Spa 1434
1442 Cheltenham Spa - Birmingham New Street 1526
1553 Birmingham New Street - Marston Green 1601
Hope this Helps
