Section 213(5) Housing Act 2004 requires a landlord to give the tenant information as may be prescribed.
(5) A landlord who has received such a tenancy deposit must give the tenant and any relevant person such information relating to—(a) the authorised scheme applying to the deposit,(b) compliance by the landlord with the initial requirements of the scheme in relation to the deposit, and(c) the operation of provisions of this Chapter in relation to the deposit,as may be prescribed.
(6) The information required by subsection (5) must be given to the tenant and any relevant person—(a) in the prescribed form or in a form substantially to the same effect, and(b) within the period of 14 days beginning with the date on which the deposit is received by the landlord.
The information required is contained in The Housing (Tenancy Deposits) Prescribed Information Order 2007.
It is best to look at the prescribed information order as a check-list. If anything is missing from the check-list, it is not quite right and requires amending.