There is disruption on CrossCountry trains between Cheltenham Spa and Bristol Parkway because of a derailed train.
Their services are being diverted via Gloucester station causing longer journey times, and there's no estimate for when the line may reopen.
This will also affect First Great Western services.
Passenger groups and unions have reacted angrily to news that rail fares are to rise by more than inflation from January.
The RMT and Action for Rail organised demonstrations at Bristol's Temple Meads station on Tuesday morning over the 4% increase.
Opponents claim fares have risen three times faster than wages in the last six years.
The Government says it's investing heavily in the railways.
Mike Hewitson from Passenger Focus spoke to ITV News West Country:
Rail fares are increasing nearly twice as fast as incomes, outstripping wages by almost 14 percent since 2007, according to the Campaign for Better Transport.
This graph shows how rail fares and incomes became decoupled in 2007, with rail fares soaring far above increases in earnings.
The group also says that next year will be the eleventh successive year in which rail fares have risen above the level of inflation.
The slight drop in the rate of inflation is due to air fares and price movements in the recreation, culture, clothing and footwear sectors, according to the Office for National Statistics (ONS).
A rise in petrol and diesel prices partially offset the fall, the ONS said.
Regulated rail fares in England are set to rise by an average 4.1% from January after the headline rate of retail price index inflation fell to 3.1% in July from 3.3% in June.
The rate of consumer price index inflation fell to 2.8 percent in the year to July 2013, down from 2.9% in June, according to the latest figures from the Office for National Statistics.
The number of rail passenger journeys has increased dramatically from around 750 million per year to 1.5 billion, according to Transport Secretary Patrick McLoughlin.
Transport Secretary Patrick McLoughlin has defended the expected rise in rail fares next year saying that the rail network is in need of "huge investment". He told the BBC:
Nobody likes to see rail fares go up. I don't like to see it and passengers don't like to see it. We are massively investing in the railways, with £130 million being spent here at Nottingham, £800 million at Reading and £600 million at Birmingham.
Pressed to say when the government plans to end above-inflation fare rises, he said that the Office for Budget Responsibility has a target to do so in 2015.
He said that just over £8 billion was raised by ticket sales and just under £4 billion by taxpayers for the UK's rail services.
Asked why rail fares continue to rise, the chief executive of the Association of Train Operating Companies said it was in part to fund better services and in part to lower the contribution from the taxpayer.
Michael Roberts told BBC Radio 4's Today programme that the government is trying to reduce the proportion of the cost of rail transport paid by the taxpayer to around 20 percent.
The Campaign for Better Transport's campaign director, Richard Hebditch, has said that rail passengers are likely to be £100-200 worse off next year as a result of fare rises.
Speaking on BBC Radio 4's Today programme, he called for the government to end above-inflation fare rises.