Re: Storage
Nope. The guidance states
"Under the Firearms Rules 1998, a prescribed safekeeping condition is attached to all firearm and shotgun certificates. It is an offence not to comply with these conditions. The maximum penalty for this offence can be up to 6 months in prison, or a fine, or both.
The safekeeping condition attached to firearms or shotgun certificates requires that the guns and section 1 ammunition must be stored securely to prevent, so far as is reasonably practicable, unauthorised people taking or using them. Any other person who does not hold a firearm or shotgun certificate is included in the term ‘unauthorised’.
When a gun or section 1 ammunition is being used or the holder has the gun with him for some purpose connected with its use, transfer or sale, reasonable precautions must be taken for the safe custody of the gun(s) and section 1 ammunition.
The condition does not apply to the ammunition for a shotgun. However, as a matter of common sense, you should take reasonable precautions for its safe custody."
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/117794/security_leaflet.pdf