Posted: 30/10/2016 at 19:45
those leaves will drop off soon but, surprise, surprise, I think the waterlogging is the cause. Possibly a bacterial problem because the plant was stressed.
i would take the plants out of those pots...when the leaves have fallen....and check the compost for signs of vine weevil grubs.
I would also freshen the compost......no sign of chlorosis so I guess you used ericaceous compost.
Make sure your drainage is good..I know you drilled more holes but are they big enough?