I would imagine Network Rail staff wouldn't be furloughed as funded by the government. I work in the public sector and while our income has fallen I think it would be seen as politically unacceptable at this point to start taking the government money when people are struggling to pay bills, rates, council tax etc. I'd see NR» as in the same position.
NR have not furloughed any staff. A number of maintenance depots sent some apprentices home on full pay, this is more to do with social distancing in vans etc. Some vulnerable staff or staff that have vulnerable relatives or partners at home were advised not to attend work if they believed there to be a risk.
NR full recognises the health risk it is asking its front line staff to work in and has worked with the Unions to develop, very quickly, working practices.
The difference between NR and
TfL» , NR is an "at distance" an Government organisation and is funded as such, TfL is funded by the London Authority with very little Government funding.
HMG will I suspect have to provide TfL with some funding to increase the current lockdown level of services when the National network raises its levels of service.