Given sense was seen about trying to prohibit 50 calibre rifles in private ownership - the latest legislation having been dropped, you would like to think that the deac situation may eventually get looked at.
In theory, with more border controls, there maybe less eastern european "deacts" getting into the country, which seem to be in large part the source of firearms illegally held (together with ammunition).
None of the present controls, be it on deacs or legally held firearms, deals with the firearms in circulation used by the criminal fraternity.