Name on Land Registry deeds = proprietership?

[74woko]

I have just discovered that my brother, who died recently, must have for reasons unknown to me, placed my name on the deeds of the house in which he lived, and which he owned jointly with his son.
Does this mean I am a part owner of the property with his son ?
Any other implications regarding proprietership?
Thank you.

[des8]

Condolences on your recent loss.

You are a legal owner (jointly with your nephew) of that property, if not the beneficial owner.

Do you know if you were listed as joint tenants or tenants in common?