Quick question:

While looking into a Hebridean fly-drive holiday next spring, I cannot get any Scottish island destinations to price up.

I was looking at BRR, SYY, BEB...error given on the BA site is:

Error
We are unable to find seats for your journey. The most common reasons for this are:
You may have requested a route that we do not operate at that time of year.
We may not fly to the destination you have chosen.
Your journey may require more than six flights; you can only book up to six flights on ba.com.
What you can do:
Search again using different dates.

All Scottish islands, as well as Campbeltown, are similarly affected.

Has BA ceased through-ticketing these destinations from LON? Have they stopped the FlyBe codeshare?