From Martin Bryan:
"Heaton Park Tramway is currently closed until further notice due to a theft of the overhead that happened some time between staff leaving yesterday evening and this morning. At the moment no further information is available but will be publicised once it is."
A quick update
"Approximately 40-50 metres of overhead cable has been stolen from the two reserved sections of the tramway.
An overhead specialist has been called in and a cherry picker hired in order for the damage to be thoroughly checked.
The tramway is not expected to reopen anytime soon."