If you are in the UK right now, or are intending to come very soon, and are going to be using the trains, then you should be aware that a new timetable for the whole UK comes into force this Sunday ie 2 June 2024.
For most services there will be little change, some tweaks of timing and possibly frequency, but there could be major changes on some lines, maybe services withdrawn or new ones added.
So, if you are intending to travel, do double check what is going on, especially if you booked a while ago and double especially if you have connections..
All the major rail companies can provide information as can sites like Trainline or National Rail.