Also does anyone know if the net subsidy for the Overground Network has gone down or up since it was taken over from Silverlink?
With and without capital repayments on all the upgrades that have been built.
Difficult to assess easily as revenue is retained by TfL, and Silverlink didn't break down it's accounts by route (at least not publicly)
But it is reasonably certain that subsidy has increased considerably, and that is before the capital repayments are taken into account.
Whilst patronage may have doubled (or even trebled) in terms of farebox, costs will have done also, and the gap will be wider. In Silverlink days it was a shoestring railway - Chief Planner will confirm. Since then there has been a substantial increase in staff, a more than doubling of the fleet, and large increases in other running costs eg traction power, domestic power, station maintenance etc. There is also a much larger back office staff to make it all tick, and a fleet of TfL people there to mark LOROLs homework.