Alyson Lee, 66, a retired teaching assistant from Derby, and Di Bligh, a 77-year-old former chief executive of Reading Council from Frome in Somerset, are charged with causing criminal damage by writing the words “1.5 is dead” on the 19th century biologist’s grave last month.
Two pensioners have denied damaging Charles Darwin’s grave in Westminster Abbey by spraying it with orange chalk paint.
Lee sprayed “1.5” before Bligh wrote “is dead”, Westminster Magistrates’ Court heard.
The writing refers to attempts to limit global warming to 1.5C and reduce the impact of climate change.
A spokesperson for the church said previously that it did not anticipate there would be any permanent damage caused by the protest.
