On Monday 6 and Tuesday 7 May:

* The 2306 Bristol Temple Meads to Westbury will terminate at Bath Spa at 2323. A replacement bus will run as follows:
Bath Spa 2330 - Freshford (Old Bakery) 2348 - Westwood Village (for Avoncliff) 2355 - Bradford-on-Avon 0011 - Trowbridge 0025 - Westbury 0040

On Monday 6 to Thursday 9 May:

* The 2030 Cardiff Central to Bristol Temple Meads will terminate at Bristol Temple Meads at 2121. Passengers travelling beyond Bristol Temple Meads should travel on the 2148 departure to Portsmouth & Southsea, which will call additionally at Dilton Marsh (on request) at 2235

* The 2345 Bristol Temple Meads to Frome will not run. Replacement buses will run as follows:
# Bristol Temple Meads 2345 - Keynsham (Church) 0001 - Oldfield Park (Lower Bristol Road) 0015 - Bath Spa 0020 - Bradford-on-Avon 0046 - Trowbridge 0100 - Westbury 0115
# Bristol Temple Meads 2345 - Keynsham (Church) 0001 - Oldfield Park (Lower Bristol Road) 0015 - Bath Spa 0020 - Freshford (Old Bakery) 0038 - Westwood Village (for Avoncliff) 0045 - Bradford-on-Avon 0101 - Trowbridge 0115 - Westbury 0130 - Frome 0148

* The 2123 Portsmouth Harbour to Bristol Temple Meads will terminate at Westbury at 2330. A replacement bus will run from Westbury at 2340 to Trowbridge 2358, Bradford-on-Avon 0010, Bath Spa 0040 and Bristol Temple Meads 0110.

Due to engineering work taking place elsewhere on the GWR network, the following trains running in the Westbury area will be altered as follows:

* 0701 Salisbury to Bristol Temple Meads will start from Warminster at 0724
* 1512 Westbury to Warminster will not run
* 1330 Cardiff Central to Portsmouth Harbour will call additionally at Dilton Marsh (on request) at 1505
* 1530 Warminster to Bristol Temple Meads will start from Westbury at 1541
* 1323 Portsmouth Harbour to Cardiff Central will call additionally at Dilton Marsh (on request) at 1508 and will run slightly later from Westbury to Bristol Temple Meads