A copy of CC0 1.0 Universal is available on Debian systems in
/usr/share/common-licenses/CC0-1.0 

55 Articles for producing material in particular typeface.

(1) This section applies to the copyright in an artistic work
consisting of the design of a typeface where articles specifically
designed or adapted for producing material in that typeface have been
marketed by or with the licence of the copyright owner.

(2) After the period of 25 years from the end of the calendar year in
which the first such articles are marketed, the work may be copied by
making further such articles, or doing anything for the purpose of
making such articles, and anything may be done in relation to
articles so made, without infringing copyright in the work.

(3) In subsection (1) “marketed” means sold, let for hire or offered
or exposed for sale or hire, in the United Kingdom or elsewhere. 

Comment: This is section 55 of the Copyright, Designs and Patents Act 1988. Obtained from <https://www.legislation.gov.uk/ukpga/1988/48/section/55>. Contains public sector information licensed under the Open Government Licence v3.0.

Open Government Licence v3.0

You are encouraged to use and re-use the Information that is available
under this licence freely and flexibly, with only a few conditions.

Using Information under this licence

Use of copyright and database right material expressly made available
under this licence (the 'Information') indicates your acceptance of
the terms and conditions below.

The Licensor grants you a worldwide, royalty-free, perpetual,
non-exclusive licence to use the Information subject to the
conditions below.

This licence does not affect your freedom under fair dealing or fair
use or any other copyright or database right exceptions and
limitations.

You are free to:

   copy, publish, distribute and transmit the Information;

   adapt the Information;

   exploit the Information commercially and non-commercially for
   example, by combining it with other Information, or by including
   it in your own product or application.

You must (where you do any of the above):

   acknowledge the source of the Information in your product or
   application by including or linking to any attribution statement
   specified by the Information Provider(s) and, where possible,
   provide a link to this licence;

   If the Information Provider does not provide a specific
   attribution statement, you must use the following: Contains public
   sector information licensed under the Open Government Licence
   v3.0.

   If you are using Information from several Information Providers
   and listing multiple attributions is not practical in your product
   or application, you may include a URI or hyperlink to a resource
   that contains the required attribution statements.

   These are important conditions of this licence and if you fail to
   comply with them the rights granted to you under this licence, or
   any similar licence granted by the Licensor, will end
   automatically.

Exemptions

This licence does not cover:

   personal data in the Information;

   Information that has not been accessed by way of publication or
   disclosure under information access legislation (including the
   Freedom of Information Acts for the UK and Scotland) by or with
   the consent of the Information Provider;

   departmental or public sector organisation logos, crests and the
   Royal Arms except where they form an integral part of a document
   or dataset;

   military insignia;

   third party rights the Information Provider is not authorised to
   license;

   other intellectual property rights, including patents, trade
   marks, and design rights; and

   identity documents such as the British Passport

Non-endorsement

This licence does not grant you any right to use the Information in a
way that suggests any official status or that the Information
Provider and/or Licensor endorse you or your use of the Information.

No warranty

The Information is licensed 'as is' and the Information Provider
and/or Licensor excludes all representations, warranties, obligations
and liabilities in relation to the Information to the maximum extent
permitted by law.

The Information Provider and/or Licensor are not liable for any
errors or omissions in the Information and shall not be liable for
any loss, injury or damage of any kind caused by its use. The
Information Provider does not guarantee the continued supply of the
Information.

Governing Law

This licence is governed by the laws of the jurisdiction in which the
Information Provider has its principal place of business, unless
otherwise specified by the Information Provider.

Definitions

In this licence, the terms below have the following meanings:

   'Information' means information protected by copyright or by
   database right (for example, literary and artistic works, content,
   data and source code) offered for use under the terms of this
   licence.

   'Information Provider' means the person or organisation providing
   the Information under this licence.

   'Licensor' means any Information Provider which has the authority
   to offer Information under the terms of this licence or the Keeper
   of Public Records, who has the authority to offer Information
   subject to Crown copyright and Crown database rights and
   Information subject to copyright and database right that has been
   assigned to or acquired by the Crown, under the terms of this
   licence.

   'Use' means doing any act which is restricted by copyright or
   database right, whether in the original medium or in any other
   medium, and includes without limitation distributing, copying,
   adapting, modifying as may be technically necessary to use it in a
   different mode or format.

   'You', 'you' and 'your' means the natural or legal person, or body
   of persons corporate or incorporate, acquiring rights in the
   Information (whether the Information is obtained directly from the
   Licensor or otherwise) under this licence.

About the Open Government Licence

The National Archives has developed this licence as a tool to enable
Information Providers in the public sector to license the use and
re-use of their Information under a common open licence. The National
Archives invites public sector bodies owning their own copyright and
database rights to permit the use of their Information under this
licence.

The Keeper of the Public Records has authority to license Information
subject to copyright and database right owned by the Crown. The
extent of the offer to license this Information under the terms of
this licence is set out in the UK Government Licensing Framework.

This is version 3.0 of the Open Government Licence. The National
Archives may, from time to time, issue new versions of the Open
Government Licence. If you are already using Information under a
previous version of the Open Government Licence, the terms of that
licence will continue to apply.

These terms are compatible with the Creative Commons Attribution
License 4.0 and the Open Data Commons Attribution License, both of
which license copyright and database rights. This means that when the
Information is adapted and licensed under either of those licences,
you automatically satisfy the conditions of the OGL when you comply
with the other licence. The OGLv3.0 is Open Definition compliant.

Further context, best practice and guidance can be found in the UK
Government Licensing Framework section on The National Archives
website. 

Comment: Obtained from <https://spdx.org/licenses/OGL-UK-3.0.html>. Contains public sector information licensed under the Open Government Licence v3.0.