I found this little gem at
National Rail - hadn't seen any publicity.
Edit to add - 18th February 2023 to 2nd March - so weekday services affected from 20th to 24th February and 27th February to 2nd March, we believe
Engineering work is taking place between Theale and Bedwyn all week and also between Reading West and Theale from 20:05 until 05:05 each morning, closing some lines.
As a result the following amendments will apply:
Monday to Friday (all day)
Trains between London Paddington and Plymouth / Penzance will divert between Reading and Taunton (via Bristol Temple Meads, most calling). They will depart London Paddington and Reading earlier than normal.
Trains between London Paddington and Exeter St David's / Paignton / Plymouth which normally call at Newbury, Hungerford and Pewsey will divert between Reading and Westbury (via Swindon). They will not call at Newbury, Hungerford and Pewsey. Most will depart London Paddington and Reading later than normal.
Some trains will call additionally at Swindon and some trains will not run.
Some trains between London Paddington and Bristol Temple Meads (and beyond) will extend to run to / from Paignton / Plymouth / Penzance
Most local services between Swindon and Westbury will not run. Trains that do run will be retimed.
Monday to Friday until 20:00
Trains between London Paddington and Newbury will call additionally at Reading West and will terminate at Theale.
Most trains between Reading and Newbury will not run.
Trains between Newbury and Bedwyn will not run.
Monday to Friday after 20:00
Trains between London Paddington and Newbury / Bedwyn will start / terminate at Reading.
Trains between Reading and Newbury and also between Newbury and Bedwyn will not run.
Rail replacement buses will run between:
Reading and Newbury / Bedwyn
Theale and Bedwyn (calling at Thatcham, Newbury, Kintbury and Hungerford)
Theale and Newbury (calling at all stations)
Chippenham and Westbury (calling at Melksham and Trowbridge)
Check before you travel:
You can plan your journey using the National Rail Enquiries Journey Planner
Replacement Bus Travel Advice:
For helpful advice if you need to travel on a rail replacement service, including accessibility and bicycle information, please use this page.
You can find the location of your bus replacement by checking station signs or by searching for your station on our station information pages.
For Melksham it seems to reduced our train service to
05:07, 08:09 and 19:07 to Swindon
06:13 to Southampton
18:11 to Westbury