Energizer batteries in stock at Jessops.
For anyone in the UK, Jessops have the Energizer FLNP80 batteries in stock again.
When I looked a month or so ago they were showing as out of stock for home delivery, only in stock for collect in (some) stores. My local was meant to have 2 but could only find 1.
Looked again last week and they were in stock for home delivery. Think they are cheaper now too, £5.95 each. I'm sure I paid around £7 last time.
I bought two and one is the same as the one that came with my R-D1s and the one I bought a month or so ago. The other one has slightly different logo and text on it. Might be newer? Packaging for both was identical.