You know what I discovered in my little town, that was quite surprising to me? A lot of people want to learn traditional darkroom techniques and perhaps also digital hybrid stuff with trad'l output. I listed a minicourse at my university and -bam!- 30 students tried to get in, the course was literally into a waitlist 3 minutes after listing. Now I am setting up some private summer workshops and even with the university students out of town I am getting plenty of interest. If you are able to teach trad'l methods and have a darkroom, I would imagine in a city as large as London, you will find many eager students.

Just a way to make some bucks on the side whilst also building a resume...