All day, most High Speed trains to and from London Paddington will be retimed. Many trains will depart EARLIER than usual.

Most fast trains between London Paddington and Oxford will not run (trains between London Paddington / Oxford and North Cotswolds stations WILL continue to run, but will not call at Radley). Additional trains will run between Didcot Parkway, Radley and Oxford.

Trains between London Paddington and Swindon / Bristol Parkway / Cardiff Central will call additionally at Slough, Maidenhead and Twyford.

All day, most local stopping trains from London Paddington to Reading and Didcot Parkway will only run between Reading and Didcot Parkway. Passengers at Slough, Maidenhead and Twyford should use services running between London Paddington and Swindon / Bristol Parkway / Cardiff Central (see above).

Passengers should check their journeys at nationalrail.co.uk

On Monday 20 to Wednesday 22 May, the 2340 Exeter St Davids to Exmouth will not run. Replacement buses will run as follows:
* Exeter St Davids 2341 - Exeter Central 2346 - Digby & Sowton 0006 - Topsham 0016 - Lympstone Commando 0026 - Exmouth 0036
* Exeter St Davids 2341 - Exeter Central 2346 - St James' Park 2351 - Polsloe Bridge 2359 - Digby & Sowton 0010 - Newcourt 0016 - Topsham 0024 - Exton 0032 - Lympstone Commando 0037 - Lympstone Village 0043 - Exmouth 0053

On Tuesday 21 to Thursday 24 May, the 0019 Exmouth to Exeter St Davids will not run. Replacement buses will run as follows:
* Exmouth 0019 - Lympstone Commando 0029 - Topsham 0039 - Digby & Sowton 0049 - Exeter Central 0109 - Exeter St Davids 0114
* Exmouth 0019 - Lympstone Village 0029 - Lympstone Commando 0035 - Exton 0040 - Topsham 0048 - Newcourt 0056 - Digby & Sowton 0102 - Polsloe Bridge 0112 - St James' Park 0118 - Exeter Central 0126 - Exeter St Davids 0131

The 0018 Henley-on-Thames to Reading will terminate at Twyford at 0030. An alternative rail connection will run from Twyford at 0040 to Reading arriving at 0047.