Thanks for your comments. In answer to ged's question

"I like the pseudo-lith look you've got and tried this a few weeks back by adding NaOH to Ilford PQ but wasn't able to get the effect you've achieved. How much NaOH were you using per litre? I might not have added enough."

I used PQ to develop my film only, then I used my own brew of Ilford ID-13. The formulation I had the ID-13 used 50g KOH, and as I don't have that on the shelf I used the same mass of NaOH. This developer is also a high contrast film developer, but I read somewhere it could be used to develop prints and this is what I did.