Going this Friday, return Saturday. Can't find any cheap advance tickets for the above, so decided to just use off-peak returns for flexibility, and splitting at Chesterfield.
Best I can get is:
DHM - CHD £33.65
CHD - LBO £10.70
with YP railcard
Best I can get is:
DHM - CHD £33.65
CHD - LBO £10.70
with YP railcard