Rules are designed to be broken, if a fish will nor survive I would get out the preist. stupid having to release a fish to die. There are worse beats than Aberlour but I can not name them on a open site.
I'm sorry to tell you that you have little chance of catching a running fish on B beat on those dates.Graham Ritchie and I am fishing Dephur, then Tulchan D then Delphur again so we will ensure no fish get past.
I will post a few more notes on Tulchan B tomorrow but 7 hours drive + 7 hours fishing has had a strange effect on my brain and I cannot remember the name of then lovely pool that is shared with C beat on alternate days, worth checking you are on the right rotation.