I have to second that. Having spent the last year working in an office with someone whose "secondary duty" is MRT I can safely say it does in some cases increase the workload for others while they're out on the hills earning quals, saving lives and, lets face it, most likely enjoying it. I've no problem with MRT as a secondary duty, since they fulfill a requirement, but it should be just that, and not interfere with their primary tasking. Couldn't we chin off the civie rescue responsibility for the RAF MRT and increase the size of the civvie teams, then RAF secondary duty MRT could do their training in their spare time, not in work time!
You've highlighted a real problem. If some in the military have issues with people leaving work for MRT, how do you think civilian companies will feel when doing the same for MRT and, in the grander scheme, reserve service?
Civilian MRT are part time as well.
Its all in the ethos of Daves big society.