If your journey involves a cross from Arriva Trains Wales to Arrive
Cross Country, your journey may DOUBLE in price.

http://www.digitaltoast.co.uk/simplified-train-fares-ripoff-scam-price-rises

The Association of Train Operating Companies have announced a
"simplification" of the fares.
http://www.nationalrail.co.uk/times_fares/simple_fares.html

Rail fares 'set to be simplified'
http://news.bbc.co.uk/1/hi/business/7364127.stm

Basically, despite the nonsense from AOTOC and Passenger Focus
"welcoming" this move, it has meant BIG increases, in some cases
DOUBLE the cheapest fare.

Examples:
SINGLE JOURNEY From Reading (RDG) to Birmingham New Street (BHM)
Currently: £9.00 After 18th April: £14.50

SINGLE JOURNEY from Oxford (OXF) to Aberystwyth (AYW)
Currently: £10 After 18th April: £20.50

SINGLE JOURNEY from Reading (RDG) to Shrewsbury (SHR)
Currently: £10, After 18th April:£18.00