Thank you Reenie and TreeofLife,
This is more or less what I thought too. This kind of research grants are so competitive though that you really want to give your application the best possible chance to stand out. Although probably in the end the research interests of the selection committee will play a decisive role.
In the end I attached a personal statement including why I deserved the grant, the skills that I acquired in the course of my PG studies that are relevant to the project and what I will do with the money, as it was pretty impossible to include them in the one-page Project proposal.
So, now I can only keep my fingers crossed and wait.