No F2traditional document required by section 1(2) of this Act shall be valid in respect of the formalities of execution unless it is subscribed by the granter of it or, if there is more than one granter, by each granter, but nothing apart from such subscription shall be required for the document to be valid as aforesaid.

A contract mentioned in section 1(2)(a)(i) of this Act may be regarded as constituted or varied (as the case may be) if the offer is contained in one or more F3traditional documents and the acceptance is contained in another F4traditional document or other F3traditional documents, and F5such document is subscribed by the granter or granters thereof.

Nothing in this section shall prevent a F6traditional document which has not been subscribed by the granter or granters of it from being used as evidence in relation to any right or obligation to which the document relates.

This section is without prejudice to any other enactment which makes different provision in respect of the formalities of execution of a document to which this section applies.