This is a measure we can take straight away, without further legislation, that could save lives or prevent injury.
Mr Moult had been convicted of a violent offence, and imprisoned for it. Surely that is a breach of the conditions of whatever law allows the issue of a shotgun licence?
From the moment that someone is charged with a violent offence, there should be an automatic question asked by the police, 'Does this person have legal weapons?' They have access to the firearms register. They should confiscate all weapons at that stage and only return them if they are acquitted or charges are dropped. A caution should not count as an acquittal in this respect.
If convicted of a violent offence their right to own weapons and have permits should be permanently revoked.