Veggie Perrins sells saffron in Canterbury market Fridays at 3.99 for 5g. Our tesco sells Spanish Saffron on and of for 2.99 for 10g. I think the Schwartz is I think 1g.
I buy Chervil in large bunches in Calais Thursday market, but don't go specially as they don't always do it. You can sometimes get growing pots in French supermarkets. You could always det some seeds and a pot and grow some on your window cill.