I am having probs finding one
It needs to have a long thickish strap so I can wear diagonally as my ostepath tells me I am buggering my neck carrying one over shoulder
Be medium sized or a bit bigger
Neutralish colour
Canvas or leather would be fine, nothing too expensive or posh just for work
Oh and it MUST have a pocket on the outside that is easily accessible for tube pass etc so I don't have to open whole bag
TA