The 2015 Heritage at Risk Registers indicate that 928 of the 14,790 (approximate) listed places of worship in England are at risk. Since 2014 there have been 161 new places of worship added to the list and 118 removed.
The four main reasons that places of worship end up on the Register are issues with gutters and downpipes, high level stonework, roofs, and structural stability. Most suffer from at least two of these problems.
The 2015 Registers are available here: http://historicengland.org.uk/