Rather ironically, due to privatisation and the chopping up of the various parts of what was once BR, the result is many more disputes. Some don’t make it to industrial action, being settled by negotiation. But unfortunately some do. And these, if they have a significant affect on services are noticed by passengers and the media.
Because the RMT represents a wide variety of members across the railway (and has members in bus companies and other transportation and maritime companies), it’s always likely that it will appear that there are more industrial disputes.
The RMT and it’s members would much rather there be a negotiated settlement. The dilemma is how to best protect the members T&Cs, working practices and get a reasonable pay rise. Especially if the employer is insisting that there has to be changes to members T&Cs and/or working practices.