unity of possession

It is, however, well settled that four unities must be present for the creation of a joint tenancy, namely the unities of possession, interest, title and time.

In the present case there is no dispute that the two agreements of 6 June 1984 operated to confer on the defendant and Miss Guile unity of possession and title.

As between co-owners there is unity of possession, each is entitled to possession and use of the chattel, and the mere enjoyment in one way or another by one co-owner cannot amount to conversion against the other.