I have a BHD-LHR-JER/JER-LHR-BHD with 3 nights in JER and 2 in LAS
Inside that I have a JER-LHR-DFW-LAS/LAS-DFW-LHR-JER with 6 days car hire (The 2 nights in LAS from the first trip are the first/last night of this trip)
Other nights in the LAS area are booked independently
I have one slight fly in the ointment, the 3 nights in JER are split as first night and last 2 nights, 2 nights as I was getting in early before the 2nd nights checkin time but my flight has been changed so now I only really need 1 night and I will simply lose the penultimate night.
It was booked on 1st Jan so under the old conditions but I don't believe BA would work it out - but it is due to their change anyway.
The LHR-DFW-LHR are in F with all the rest in J/I so with a bit of luck and a tail wind - 1480 TP's at £2.36/TP all in my grace period which I am quite content with.