If parents of children die without leaving a will,wll the house they owned be classed as left "Jointly" now owned by their children,or owned "In Common"by them?
If I remember correctly a joint tenancy is automatically severed on the death of the joint tenants. Doesn't really matter anyway, as any joint tenant can sever the joint tenancy at any time and create a tenancy in common.
The house will be owned (in trust) by the administrators of the estates (plural), assuming they both died together and that it didn't pass to the survivor under a joint tenancy.
They can decide when passing it to the children as to whether it's joint or common.