Found this rather interesting piece of information here and thought I would save it here for future reference. I don't know how relevant it is to the recent outlook but it could prove to be helpful.
VALUE ADVANCE 1ST SINGLE B from COVENTRY to LONDON is £26.00.
This journey may be cheaper if the ticket is split at WARWICK.
Investigating the journey from COVENTRY to WARWICK then LONDON.
STANDARD DAY SINGLE from COVENTRY to WARWICK is £3.90.
This journey may be cheaper if the ticket is split at LEAMINGTON SPA.
Ticket cost is less than £8.00 so not investigating breaks.
JUST 15 SINGLE from WARWICK to LONDON is £14.90.
Total price is £18.80 (£7.20 cheaper than £26.00)
Summary
STANDARD DAY SINGLE from COVENTRY to WARWICK at £3.90
JUST 15 SINGLE from WARWICK to LONDON at £14.90
The total journey price is £18.80.
This is £7.20 cheaper than a £26.00 ticket for the whole journey.
Although I don't know how long it takes by train, considering it costs £14 for a return from where I live in Kent it cant be more than 2 hours as its only 45 mins by train from my house in Kent.
I did find National express which is coach travel, but they have really good prices, and what really interests me is the fact that they have funfare rates from £1 each way, and I've checked some of the dates I'm planning on going places and funfare seats are available, so I could travel to London for just £2 which is a saving of £24 over the train, and by coach it says it takes about 2 hours which is the same time it would take by car almost but also a lot cheaper. And £18.00 economy return is also good on the coach.