Hi!
I took two more BW reversal photos today, and used the Ilford recipe for bleach (potassium permanganate and sulphuric acid) that doesn't involve dichromate.
There's a speed increase with this method, so I had to halve the previous exposure time.
The wall was 10m 30s, and the trees were 2m.
The paper is Kentmere VC Select RC glossy, torn down from 10x8 to 4x5.
The developer is Champion Suprol 1+9
brilliant! Love the sophisticated method of getting the paper to size too!