He (Malcolm Sutton) is aware of a lot of the names Keith

Not true Martin.
He has been updating his data continuously, most recently last month.
All updates listed here.http://cain.ulst.ac.uk/sutton/updates.html

Dead Horse merely points out that only those Security Forces actually killed by terrorist action are counted, not all those who died on active service by accident etc.

The Sutton figures are definitive of all those who died by violence.
The chart is accurate and shows all violent deaths and the perpetrators.
If it conflicts with your views, it is time to review them.