On yours/parents house insurance you are unlikely to be covered under the basic sum assured as this is for contents in side the home
However if the policy has 'personal possessions' cover which is usually an add on,then this covers items taken outside of the home
usually up to an amount £1,000 to £1,500 with no need to name the items. Over these amounts you usually have to specify the items and they are named on the policy.
Different insurance companies can vary what they will and won't cover under personal possessions.