2pm UPDATE: Lines have now reopened but FGW says some "residual" delays still happening.
Train tickets are being accepted on some bus services in the Bath area after signalling problems at Trowbridge.
At the moment, trains cannot run between Bath Spa station and Westbury.
The following routes are accepting First Great Western tickets:
First Somerset & Avon Bus X39 from Bristol Temple Meads - Bath Bus Station
First Somerset & Avon Bus 178, 338 & 339 from Bristol Temple Meads - Keynsham - Bath Bus Station.
First Somerset & Avon Bus 264 & 265 from Bath (Bus Station) - Bradford-on-Avon - Trowbridge - Westbury - Warminster - Salisbury.
Network Rail hastweeted that its signalling and telecoms staff are on site working to resolve the issue.
