A recent court case has reminded us of the long standing concept of delivery in respect of a deed. The principle is that an essential part of the validity of a deed is not just its execution by the relevant party but its delivery by that party. If there is no delivery then there is no valid deed. It can be quite a surprising principle -delivery can be effected even if the party delivering the deed retains the actual deed; a deed need not have a date - it is presumed that its date is the date of delivery.
Statute provides that for a company a document shall be presumed to be delivered upon its being executed, unless a contrary intention is proved. So if your company is executing a deed, a Land Registry Transfer or a mortgage, for instance, it will be presumed to have been delivered as soon as the company has executed it. That may well be something which you definitely do not want to happen.
Your legal adviser may have certain formalities and checks to go through before it is the right time for you to be bound. What you could do if you want to avoid the deed taking immediate effect is to ensure that the execution wording is "EXECUTED (but not delivered until the date hereof) as a deed" and then to execute it with the intention of returning it to your lawyer so that the lawyer can deliver it on your behalf when the appropriate formalities and checks have been completed.