Depending on the nature and extent of changes they are applied in carefully managed
periodic releases, following thorough impact assessment and testing. The Post Office
cannot make public information that could compromise the security of its systems and
I am unable therefore to provide you with technical details of our software updates.
As information has been exempted under Section 43(2) and Section 31(1)(a) of the
act, a public interest test applies. This involves weighing the balance of public interest
in maintaining the exemption or releasing the information. Post Office understands
that there is public interest in promoting the transparency and understanding of mat-
ters which are of interest to the public. However, there is also strong public interest in
ensuring that Post Office is able to operate in a fair marketplace in relation to its com-
mercial activities and that the integrity its process and systems is protected from
fraudulent or other criminal activity. This is equally applicable to the interests of its
commercial partners, who should not suffer security or commercial detriments as a
result of inappropriate disclosure of the information.
Accordingly, Post Office considers that the public interest is best served by maintain-
ing the exemption respect of the information requested.
It would also be nice if you could indicate whether or not the subpostmaster
network has or has not been notified of these errors that remain in the system
until the new release goes live
We are planning on providing Updates on releases to Horizon to Postmasters and as a
gesture of mutual cooperation we will provide you with a copy of the first Update
shortly after release under separate cover.
If you have any queries about this response, please contact me. Do remember to
quote the reference number above in any future communications.
I am sorry I could not provide you with the information you requested on this
occasion, however if you are dissatisfied with the handling of this response, you do
have a right to request an internal review. You can do this by writing to the address
below stating your reasons for your internal review request.
Information Rights Manager
Post Office Limited
Information Rights Team
20 Finsbury Street
If, having requested an internal review by Post Office, you are still not satisfied with
our response you also have a right of appeal to the Information Commissioner at:
Information Commissioner's Office
Telephone: 0303 123 1113
Information Rights Team
Post Office Limited is committed to protecting your privacy, information about
how we do this can be found on our website at www.postoffice.co.uk/privacy