I guess what you are getting at is if you had a Strike on the Monday that was not to book on for shifts between 00:01 and 23:59 . And you had a staff member with a book on for an 8 hour turn that was at 23:00 on the Monday day you could ammd the booking on time to 00:00 Tuesday .What I’m getting at, is if they (where permitted) can change your shift start time (bring it forward) and compel you to work on a strike day that otherwise would have been a rest day for you.
Or alternatively change your shift to a later time (where permitted) and compel you to work on a strike day.
The other thing, and the job of a signaller is a good example, if there is a function where a small number of staff affect a significant part of the network, how is it going to work in practice.
In order to provide a minimum service level, could the company make as many as half the employees work?
Generally there are restrictions on why you can alter the booking on time of a fixed job for traincrew , so there would have to be a bona-fide reason that was not just the industrial action . Generally they can issue short term planning diagrams for engineering work . So it is unlikely that you could just alter the booking on time in this way . Ive heard reports that some Toc's did try doing this earlier in the dispute and were challenged on it .
So where I am RMT does not sanction RDW for Station Staff or Guards , so it is completely up to the individual choice with there being some who never work any voluntary overtime , some who do the odd bit and some who hammer it . Obviously the RMT's position is that there should be full employent . There have been bespoke agreements to pay enhanced RDW rates for specific things like learning new traction or new equipment to entice some of the members that never do RDW in for training .The union does accept RDW but it's reasoning is usually for unusual amounts of sickness plus to cover training , not for the companies to under resource
Where I am ASLEF make agreements for RDW , in the whole time I have been there the RDW sanction from ASLEF has always been for training purposes . Of course as everywhere there has probably been some misuse of that by the company . But generally its been at times when industrial relations have been in a healthier place so some give or take has happened .
Having RDW available for training makes sense , say you get a whole new fleet of trains or a new route opens . For a period of time you are going to need to release drivers to go and train the new traction. Now most depot establishments will have a number built in for training but this will generally be for 1-1 stuff like those returning off long term sick or drivers moving links going out route learning .
With a whole new fleet or a new route to the depot you might want to release more than just 1 or 2 drivers at a time to do is more efficiently or to meet a date for introduction into service of the new route/traction . So RDW has a place for something like that where for a short period of time you need extra release above what is already built into the establishment calculator . And generally whilst you will have the same mix of those that dont do any overtime , those that do a bit and those that hammer it . Most will come in on RDW for training days as its something a bit different .