I am posting this to help some who may want to know the exact materials I use for my graphite sketches on the tube, train and bus.
1.Daler-Rowney Sketchbook A6 EBONY (62)- 150 g/m acid free cartridge paper
2.Pitt Graphit (129902) 2B FABER CASTELL
3.Rotring visupencil 0.5 0r any clutch pencil
4. A Graphite stick holder- not sure of the supplier but most art shops have them.