C&B , the SAR effort came from Boulmer and Prestwick, plus the LB`s as BEagle said earlier. Damn good going for Boulmer as flight time is usuallly about 1 hour to that position.
Sadly you are right in that Leuchars lost their SAR flight many moons ago.
Ref RNLI, the mechanics are full time on many stations, as are the coxswains.
Interestingly (vaguely) the Thames LB`s now have some full time crews. Actually, thats not interesting at all at this time on a sunday morning. Jeez.