I was supposed to have a dental check-up today and booked a day's holidays, but the appointment was moved to next month... but i decided to still have the day off! I would have gone to somewhere like Derby afterwards anyway so the only real difference is that was able to go there earlier... with less clean teeth.
I saw quite a lot today at Derby station including the latest London Underground S Stock train to return to its place of birth for modifications - a move i've been keen to see for awhile, a test train and a rail tour too. You can see my photos here.