During July-September, there is work on the rail line at Bristol and there will be train disruptions. Portsmouth to Cardiff - trains wont stop at Bristol Temple Meads but will stop at Bristol Parkway instead.
From 9 August - 3rd September there will be no trains between Bath and Bristol Temple Meads. Instead there will be rail Replacement buses every 15 mins in peak hours direct to Bristol or Bath. A 1 an hour bus service calling at Oldfield Park and Keynsham will be in operation.
On 7 and 8 August there will be no trains at all between Bath and Bristol or Bristol to Bath.
Bath to London and vice versa will not be affected in the main, but there will be a reduced number of services.
There are other changes from other stations, for more information please contact GWR on GWR.com/Bristol.