The saving associated with installing a new boiler already assumes you have heating controls or that they will be installed with the boiler hence you cannot select both measures.
Important note on savings:
If you were to install a combination of insulation measures, especially loft insulation and cavity wall insulation, you will reduce the overall heating requirements of your home. This would result in significantly reduced savings from installing a new high efficiency boiler or heating controls than are expressed in this simple checklist.