I have just found a PDF file from Ilford giving development times and chemicals needed for processing B&W slides. They suggest Pan F and this is what they base their times on. However the chemicals needed for the bleaching stage requires Sulphuric Acid. Now that is pretty savage stuff and I am not sure I would be happy using it.
There is a proprietary kit made by FOMA and is 'occasionally' available in the UK but it is very expensive (The words of a supplier) They are not the best company to deal with when fulfilling orders so he told me. I will give this a bit of thought. It is the acid that puts me off.
I have some which I did myself perhaps 35-40 years ago then sepia toned them. They are mounted in glass and are as good as the day they were made. I just wanted to reproduce modern subjects the same way.